Find the six trigonometric function values of the angle θ in standard position, if the terminal side of θ is defined by x + 2y = 0, x ≥ 0.
Answers
Answer:
[tex]\sin \theta = \frac{y}r} = \frac{-1}{\sqrt{5}} \cdot \frac{\sqrt{5}}{\sqrt{5}} = -\frac{\sqrt{5}}{5}\\\\\cos \theta = \frac{x}{r} = \frac{2}{\sqrt{5}} \cdot \frac{\sqrt{5}}{\sqrt{5}} = -\frac{2\sqrt{5}}{5} \\\\\tan \theta = \frac{y}{x} = \frac{-1}{2} = -\frac{1}{2} \\\\\cot \theta = \frac{x}{y} = \frac{2}{-1} = -2\\\\\sec \theta = \frac{r}{x} = \frac{\sqrt{5}}{2} \\\\\csc \theta = \frac{r}{y} = \frac{\sqrt{5}}{-1} = -\sqrt{5}[/tex]
Step-by-step explanation:
First, we need to draw the terminal position of the given angle. To do so, we need to find a point that lies on the straight line [tex] x + 2y= 0, x\geq 0 [/tex]
If we choose [tex] x = 2 [/tex] (we can do so because of the condition [tex] x \geq 0 [/tex], which means that any positive value is suitable for [tex] x [/tex]), then we have
[tex] 2 +2y = 0\implies 2 = -2y \implies y = -1 [/tex]
Therefore, the terminal side of the angle [tex] \theta [/tex] is passing through the origin and the point [tex] (2,-1) [/tex] and now we can draw it.
The angle [tex] \theta [/tex] is presented below.
The distance of the point [tex] (2,-1) [/tex] from the origin equals
[tex]r = \sqrt{2^2 + (-1)^2} = \sqrt{5}[/tex]
Now, we can determine the values of the six trigonometric function, by using their definitions.
[tex]\sin \theta = \frac{y}r} = \frac{-1}{\sqrt{5}} \cdot \frac{\sqrt{5}}{\sqrt{5}} = -\frac{\sqrt{5}}{5}\\\\\cos \theta = \frac{x}{r} = \frac{2}{\sqrt{5}} \cdot \frac{\sqrt{5}}{\sqrt{5}} = -\frac{2\sqrt{5}}{5} \\\\\tan \theta = \frac{y}{x} = \frac{-1}{2} = -\frac{1}{2} \\\\\cot \theta = \frac{x}{y} = \frac{2}{-1} = -2\\\\\sec \theta = \frac{r}{x} = \frac{\sqrt{5}}{2} \\\\\csc \theta = \frac{r}{y} = \frac{\sqrt{5}}{-1} = -\sqrt{5}[/tex]
Related Questions
Lisa and Bill made 60 magnets for a craft fair. They sold about 55% of the magnets. Lisa says they sold about 30 magnets. Bill says that they sold about 36 magnets. Could they both be correct? Explain.
Answers
Answer:
Step-by-step explanation:
The total number of magnets that Lisa and Bill made for the craft fair is 60.
They sold about 55% of the magnets. The number of magnets that they sold would be about
55/100 × 60 = 0.55 × 60 = 33
If Lisa says that they sold about 30 magnets, she is correct because if we round off 33 to the nearest ten, it would be 30 magnets.
If Bill says that they sold about 36 magnets, he is wrong because if we round off 36 to the nearest ten, it would be 40 magnets.
The function H described by H(x) =2.75x+71.48 can be used to predict the height, in centimeters, of a woman whose humerus (the bone from the elbow to the shoulder) is x cm long.
Predict the height of a woman whose humerus is 39 cm long.
Answers
Answer:
The predicted height of the woman is 178.73 cm.
Step-by-step explanation:
Consider the provided function.
[tex]H(x) =2.75x+71.48[/tex]
Where x represents the height of humerus and H(x) represents the height of woman.
Substitute x=39 in above function.
[tex]H(x) =2.75(39)+71.48[/tex]
[tex]H(x) =107.25+71.48[/tex]
[tex]H(x) =178.73[/tex]
Hence, the predicted height of the woman is 178.73 cm.
The height of the woman is 178.73 cm.
Given to us,
function describing the height of a woman, H(x) =2.75x+71.48,
where, x is humerus (the bone from the elbow to the shoulder).
Height of a woman whose humerus is 39 cm long,
We can find the height of the woman by substituting the value of x in H(x).
H(x) =2.75x+71.48,
substituting x = 39 cm,
H(39) =2.75(39)+71.48,
= 178.73 cm
Therefore, the height of the woman is 178.73 cm.
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A quartic polynomial P(x) has rational coefficients. If √7 and 6+i are roots of P(x)=0, what is one additional root?
Answers
The additional root is 6-i.
Here's why:
Conjugate Pairs for Rational Coefficients: When a polynomial with rational coefficients has a complex root of the form a + bi (where a and b are real numbers and i is the imaginary unit), its conjugate, a - bi, must also be a root. This ensures that the polynomial remains with rational coefficients.
Applying the Conjugate Pair Rule: In this case, we're given that 6 + i is a root. Therefore, its conjugate, 6 - i, must also be a root of the polynomial P(x) = 0.
Other Roots: The problem states that √7 is also a root. However, since it's a real number, it doesn't introduce any complex conjugate pairs.
Quartic Polynomial: A quartic polynomial has four roots in total. We've identified three of them: √7, 6 + i, and 6 - i. The fourth root could be either a real number or another complex conjugate pair, but the information provided is insufficient to determine its exact value.
Solve the following inequality using both the graphical and algebraic approach:
8 - X ≥ 5(8-x)
a. x
FIRST PHOTO IS GRAPH A
SECOND PHOTO IS GRAPH B
Answers
Algebraically, x ≤ 5π - 32 solves the inequality. Graphically, the solution lies in the shaded region below the line y = 8 - x and above y = 5(8 - π) on the coordinate plane.
Algebraic Approach:
To solve the inequality 8 - x ≥ 5(8 - π), begin by distributing 5 on the right side: 8 - x ≥ 40 - 5π. Next, isolate x by subtracting 8 from both sides: -x ≥ -5π + 32. Multiply both sides by -1, and reverse the inequality sign: x ≤ 5π - 32. This gives the solution for the inequality.
Graphical Approach:
Represent the functions y = 8 - x and y = 5(8 - π) on a graph. The point of intersection is the solution to the inequality. The line y = 8 - x is a downward-sloping line passing through the point (0, 8). The line y = 5(8 - π) is a horizontal line parallel to the x-axis at a height of 5(8 - π). The shaded region below the line y = 8 - x and above y = 5(8 - π) represents the solution to the inequality.
The question probable may be:
Solve the following inequality using both the graphical and algebraic approach: 8-x≥ 5(8-π)
Finding the Break-Even Point and the Profit Function Using Substitution Given the cost function C(x)=0.85x+35,000 and the revenue function R(x)=1.55x,find the break-even point and the profit function?
Answers
Answer:
[tex]x=50000[/tex]
[tex]P(x)=0.7x-35000[/tex]
Step-by-step explanation:
Given cost function is
[tex]C(x)=0.85x+35000[/tex]
and revenue function is
[tex]R(x)=1.55x[/tex]
At break even point, revenue is equal to cost
R(x)= C(x)
[tex]1.55x=0.85x+35000[/tex]
Subtract 0.85 from both sides
[tex]0.7x=35000[/tex]
divide by 0.7 on both sides
[tex]x=50000[/tex]
Profit function
P(x)= R(x)- C(x)
[tex]P(x)=1.55x-(0.85x+35000)[/tex]
[tex]P(x)=1.55x-0.85x-35000[/tex]
[tex]P(x)=0.7x-35000[/tex]
The break-even point is found by setting the revenue function equal to the cost function, which results in the sale of 50,000 units. The profit function is calculated by subtracting the cost function from the revenue function, resulting in π(x) = 0.70x - 35,000.
Explanation:To find the break-even point where the cost and revenue functions are equal, we substitute these functions and solve for Q:
R(x) = C(x)
1.55x = 0.85x + 35,000
This gives us 1.55x - 0.85x = 35,000
0.70x = 35,000
x = 35,000 / 0.70
x = 50,000 units (break-even point)
The profit function (π) is found by subtracting the cost function from the revenue function:
π(x) = R(x) - C(x)
π(x) = 1.55x - (0.85x + 35,000)
π(x) = 1.55x - 0.85x - 35,000
π(x) = 0.70x - 35,000
Hence, the profit function is π(x) = 0.70x - 35,000.
A team of dogs drags a 70.9 kg sled 1.24 kmover a horizontal surface at a constant speed.The coefficient of friction between the sledand the snow is 0.193.The acceleration of gravity is 9.8 m/s2.Find the work done by the dogs.Answer in units of kJ.
Answers
Answer:
166.284 KJ
Step-by-step explanation:
We are given that
Mass of sled =70.9 kg
Displacement of sled=1.24 km
Coefficient of friction=[tex]\mu=[/tex]0.193
Acceleration due to gravity=[tex]g=9.8m/s^2[/tex]
We have to find the work done by the dogs in units KJ
Friction force=[tex]\mu mg[/tex]
Friction force =f=[tex]0.193\times 70.9\times 9.8=134.1N[/tex]
Force applied by team of dogs=Friction force
F=f=134.1 N
Work done=[tex]F\times s[/tex]
We have s=1.24 km=[tex]1.24\times 1000=1240m[/tex]
1 km= 1000 m
Work done=[tex]134.1\times 1240=166284 J[/tex]
1 KJ=1000J
Work done=[tex]\frac{166284}{1000}=166.284KJ[/tex]
Hence, the work done by the dogs=166.284 KJ
A fair dice (six-sided) is rolled twice. What is the probability that the sum of the numbers rolled will add up to seven? List the outcomes representing the sum of 7?
Answers
there are 36 possible outcomes when rolling dice twice. 6/36 = 1/6 chance
When a fair dice is rolled twice, it has 36 possible outcomes. The sum of the numbers that amount to 7 can be got in 6 ways. Therefore, the probability of rolling a sum of 7 is 1/6.
Explanation:When solving a probability question, the first step is to determine all the possible outcomes. Since a dice has 6 sides, when you roll it twice, you have 6x6 = 36 possible outcomes.
We are looking for the outcomes where the sum of the numbers is exactly 7. There are six (1,6), (2,5), (3,4), (4,3), (5,2), and (6,1).
The probability is then calculated by taking the number of desired outcomes and dividing it by the total number of outcomes. So, the probability of rolling a sum of 7 with two dice is 6 / 36 = 1 / 6.
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A relationship in which both the independent and dependent variables are influenced by a causally prior control variable such the original relationship is "explained away" by the control variable is referred to as:
a. spuriousness
b. statistical significance
c. percentage difference
d. dependence
Answers
Answer: (a) spuriousness relationship
Step-by-step explanation:
Spurious occurs between two variables that are actually caused by a third variable. Examples is like a number of teachers in region and number of people learn from college.
A roller coaster starts down the slope at 4 m/s. But 3 seconds later at the bottom of the slope it's speed is 22 m/s. What is the average acceleration?
Answers
Answer: 6m/s²
Step-by-step explanation:
Let
Initial Velocity be V_0 = 4m/s
Time be t = 3s
Final Velocity be V_n = 22m/s
Acceleration be A = (Final Velocity - Initial Velocity) / time
A = (V_n - V_0) / t
= (22 - 4) / 3
= 18/3
= 6m/s²
The average acceleration of the roller coaster is 6 m/s².
Explanation:The average acceleration can be calculated by using the formula:
average acceleration = (final velocity - initial velocity) / time interval
In this case, the initial velocity is 4 m/s, the final velocity is 22 m/s, and the time interval is 3 seconds. So, the average acceleration is:
average acceleration = (22 m/s - 4 m/s) / 3 s = 6 m/s²
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Keith drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 8 hours. When Keith drove home, there was no traffic and the trip only took 5 hours. If his average rate was 21 miles per hour faster on the trip home, how far away does Keith live from the mountains? Do not do any rounding.
Answers
Answer:
Keith live 280 miles far way from the mountains.
Step-by-step explanation:
Consider the provided information.
Keith drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 8 hours.
Let the distance is D and average rate or speed is x miles.
[tex]Distance =Speed\times Time[/tex]
Substitute the respective values.
[tex]D=x\times 8\\D=8x[/tex]
When Keith drove home, there was no traffic and the trip only took 5
hours. The average rate was 21 miles per hour faster on the trip home,
The average rate or speed during return is x+21 miles.
Substitute the respective values in the above formula.
[tex]D =(x+21)\times 5\\D=5x+105[/tex]
Equate both the equations.
[tex]5x+105=8x\\3x=105\\x=35[/tex]
Substitute the value of x in [tex]D=8x[/tex]
[tex]D=8(35)\\D=280[/tex]
Hence, Keith live 280 miles far way from the mountains.
Final answer:
To find the distance Keith lives from the mountains, we need to set up and solve an equation using the given information about the trip duration and rates.
Explanation:
To find the distance Keith lives from the mountains, we can use the formula:
Distance = Rate * Time
Let's assume the rate Keith drove to the mountains is r. Therefore, the distance to the mountains would be 8r. We also know that on the return trip, Keith's rate was 21 miles per hour faster, so his rate on the return trip would be r + 21. The distance on the return trip would be 5(r + 21).
Since the distance to and from the mountains is the same, we can set up the equation:
8r = 5(r + 21)
Solving this equation will give us the value of r, and therefore, the distance Keith lives from the mountains.
Bruce drives his car for his job. The equation R=0.575m+42 models the relation between the amount in dollars. R, that he is reimbursed and the number of miles, m, he drives in one day. Interpret the slope of the equation.
Answers
Answer:
The slope, 0.575, means that the total amount Bruce is reimbursed in one day increases by 0.575 of a dollar for each mile he drives on that day.
Step-by-step explanation:
The slope of equation R=0.575m+42 represents the rate of change of reimbursement with respect to miles driven. Thus, for each additional mile driven, the reimbursement increases by $0.575. This means that the slope essentially represents the reimbursement rate per mile.
Explanation:The equation R=0.575m+42 given in the question is a linear equation in the form of y = mx + b. In this equation R is the dependent variable symbolizing the reimbursement amount in dollars, m is the independent variable symbolizing the miles driven, 0.575 is the slope, and 42 is the y-intercept.
The slope in this case, 0.575, interprets as the rate of change of the reimbursement amount with respect to the miles driven. That is, for each additional mile driven, the reimbursement Bruce receives increases by $0.575. Hence, the slope or 'm' is actually the reimbursement rate per mile for Bruce's travels.
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Use the distributive property to remove the parentheses
(4n^2+2n-1)3
Answers
Answer:
The answer to your question is 12n² + 6n - 3
Step-by-step explanation:
Polynomial
3(4n² + 2n - 1)
Distributive property, this property lets us multiply a sum by multiplying each term of the sum separately and if possible simplify like terms.
Solution
3(4n²) + 3(2n) - 3(1)
12n² + 6n - 3
On the beach Broadwalk ,there are 20 different places to get food.Twenty percent of them are ice cream shops . How many ice cream shops are in the park
Answers
Answer:
4
Step-by-step exp
You figure out what is 20 percent of 20 and that is 4.
Jill has applied for a job with each of two different companies. What is the probability that she will get job offers from both companies?
1) The probability that she will get a job offer from neither company is 0.3.2) The probability that she will get a job offer from exactly one of the two companies is 0.5.
Answers
Answer:0.2
Step-by-step explanation: Let the two companies be A and B
Pa = probability of getting a job offer from only company A
Pb = probability of getting a job offer from only company B
Pbb = probability of getting a job offer from both companies
Pn = ProbabityProbability of getting a job from neither companies
The relation could be combined using :
Pbb+Pa+Pb+Pn=1
Pn = 0.3
(Pa + Pb) =probability of offer from exactly one of A or B = 0.5
Pbb + 0.5 + 0.3 = 1
Pbb+0.8=1
Pbb=1-0.8
Pbb = 0.2
c. Two sculptures are similar. The height of one sculpture is four times the height of the other sculpture. The smaller sculpture is 2.5 feet tall. How tall is the larger sculpture?
Answers
Answer:
The larger sculpture is 10.0 feet tall
Step-by-step explanation:
The height of one sculpture (larger sculpture) is four times the height of the other sculpture (smaller sculpture)
Let the height of the larger sculpture be x and the height of the smaller sculpture be y
Therefore, x = 4y (y = 2.5 feet)
x = 4×2.5 feet = 10.0 feet
The larger sculpture is 10 feet tall.
Explanation:To find the height of the larger sculpture, we can use the information given. We know that the smaller sculpture is 2.5 feet tall, and the larger sculpture is four times as tall. So, we can multiply the height of the smaller sculpture by 4.
Larger sculpture height = 2.5 feet × 4 = 10 feet
Therefore, the height of the larger sculpture is 10 feet.
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Which is more economical: purchasing the economy size of a detergent at 7 kilograms for $7.15 or purchasing the regular size at 920 grams for 60cents?
Select the correct choice below and fill in the answer box to complete your choice.
(Round to four decimal places as needed.)
A.
Purchasing the economy size is more economical because the economy size costs $
____ less per gram.
B.
Purchasing the regular size is more economical because the regular size costs $
_____ less per gram.
Answers
someone pls fact check me
Purchasing the regular size is more economical because the regular size costs $0.0369 less per gram.
What is a fraction?Fraction number consists of two parts, one is the top of the fraction number which is called the numerator and the second is the bottom of the fraction number which is called the denominator.
It is given that:
The economy size of a detergent at 7 kilograms for $7.15 or purchase the regular size at 920 grams for 60 cents.
As we know.
1 kg = 1000 grams
7 kg = 7000 grams
$7.15 = 715 cents
7000 grams cost 715 cents
1 gram cost:
Per gram cost = 715/7000 = cent 0.1021 per gram
920 grams cost 60 cents
Per gram cost:
= 60/920
= cent 0.0652 per gram
Difference in cost = 0.0369
Purchasing the regular size is more economical because the regular size costs $0.0369 less per gram.
Thus, purchasing the regular size is more economical because the regular size costs $0.0369 less per gram.
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Katie is starting a babysitters sitting business. She spent $26 to make signs to advertise. She charges her initial fee of five dollars and then three dollars for each hour of service right in Solve inequality to find the number of hours she want to babysit to make a profit interpret the solution any quality
Answers
Answer:
The Inequality representing the number of hours she want to babysit to make a profit is [tex]5+3x>26[/tex].
Katie should babysit for more than 7 hours in order to make profit.
Step-by-step explanation:
Given:
Money spent on advertising = $26
Initial fee = $5
Hourly charge = $3
We need to find the number of hours she want to babysit to make a profit.
Solution:
Let the number of hours be 'x'.
Now we can say that;
The sum of Initial fee and Hourly charge multiplied by number of hours should be greater than Money spent on advertising .
framing in equation form we get;
[tex]5+3x>26[/tex]
Hence The Inequality representing the number of hours she want to babysit to make a profit is [tex]5+3x>26[/tex].
On Solving the above Inequality we get;
Now Using Subtraction property of Inequality we will subtract both side by 5 we get;
[tex]5+3x-5>26-5\\\\3x>21[/tex]
Now Using Division Property of Inequality we will divide both side by 3 we get;
[tex]\frac{3x}{3}>\frac{21}{3}\\\\x>7[/tex]
Hence Katie should babysit for more than 7 hours in order to make profit.
Interpretation:
when x=7
Amount earned will be = [tex]5+3x=5+3\times7 =5+21=\$26[/tex]
Profit earned will be = Amount earned - Money spent on advertising = 26 -26 =0
when x= 8
Amount earned will be = [tex]5+3x=5+3\times8 =5+24=\$29[/tex]
Profit earned will be = Amount earned - Money spent on advertising = 29 -26 =$3
Hence at 7 hours of babysitting profit will be 0 and at 8 hours of babysitting profit will be $3.
A researcher records the time it takes to complete a memory task in a sample of 25 participants. He finds that the average participant completed the test in 43 s. The average time to complete this task is called a(n) ______.
Answers
Answer: It is called a sample statistic.
Step-by-step explanation:
Since we have given that
A researcher records the time it takes to complete a memory task in a sample of 25 participants. He finds that the average participant completed the test in 43 s.
The average time to complete this task is called sample statistic.
As we know that
Sample statistic is the quantity which we get from the sample taken from a any specified population for using this quantity to calculate the same.
In our case, average participant completed the test = 43 sec.
It is sample statistic as we will use to find the average time for the population i.e. 25 participant to get the same calculation i.e. average time.
We will get average time is also equal to 43 sec.
Hence, it is called a sample statistic.
A box contains 80 balls numbered from 1 to 80. If 11 balls are drawn with replacement, what is the probability that at least two of them have the same number?
Answers
Final answer:
The student's question is about finding the probability that at least two of the 11 balls drawn with replacement from a box of 80 uniquely numbered balls are the same. We use the complement rule to find the probability of all balls being unique and subtract this from 1 to find the desired probability.
Explanation:
The student is asking about the probability of drawing at least two balls with the same number when 11 balls are drawn with replacement from a box containing 80 uniquely numbered balls. To solve this, we can use the complement rule, which states that the probability of an event occurring is equal to one minus the probability of the event not occurring.
The probability of drawing 11 unique balls in a row with replacement from 80 can be calculated by multiplying the probabilities of drawing a unique ball at each draw after the first. For the first ball, the probability is 80/80 (since any ball can be drawn), for the second ball it's 79/80 as one unique ball is already drawn, for the third it's 78/80, and so on until the eleventh ball.
The probability of drawing 11 unique balls is therefore (80/80) * (79/80) * (78/80) *...* (70/80). The probability of at least two balls having the same number is 1 minus this product, which represents the probability of all balls being unique.
I have 8 flavors of ice cream and 4 different toppings. How many different ice cream sundaes can I make if I choose one flavor of ice cream and only one topping?
Answers
A model of a car is available in 4 colors (black blue silver and white.) and 3 body styles(coupe sedan and wagon) there are also 2 engines to choose from , (16 cylinders, called V6 and four cylinder called l4) what is the probability of choosing a vehicle that is V6 sedan
Answers
Answer:
Step-by-step explanation:
P=1/2 *1/3=1/6
Find the midpoint of (5,9) and (-1,9)
Answers
Answer:
The answer to your question is (2, 9)
Step-by-step explanation:
Data
A (5, 9)
B (-1, 9)
Formula
Xm = [tex]\frac{1 + x2}{2}[/tex]
Ym = [tex]\frac{y1 + y2}{2}[/tex]
Substitution
Xm = [tex]\frac{5 - 1}{2}[/tex]
Xm = [tex]\frac{4}{2} = 2[/tex]
Ym = [tex]\frac{9 + 9}{2} = \frac{18}{2} = 9[/tex]
Midpoint = (2, 9)
For what value of a does (one-seventh) Superscript 3 a + 3 Baseline = 343 Superscript a minus 1?
–1
0
1
no solution
Answers
Answer:
a = 0
Step-by-step explanation:
I find a graphing calculator useful for such questions. It shows the solution to be a = 0. For the graph, we have rewritten the equation from
(1/7)^(3a+3) = 343^(a-1)
to
(1/7)^(3x+3) -343^(x-1) = 0 . . . . . this graphing calculator likes x for the independent variable
__
If you recognize that 343 is the cube of 7, you might solve this by taking logarithms to the base 7.
(7^-1)^(3a+3) = (7^3)^(a-1)
Equating exponents of 7*, we get ...
-(3a+3) = 3(a -1)
-3a -3 = 3a -3 . . . . . eliminate parentheses
0 = 6a . . . . . . . . . . . add 3+3a
0 = a . . . . . . . . . . . . divide by 6
_____
* Equating exponents of 7 is the same as taking logarithms to the base 7. Here, we use the rules of exponents ...
1/a^b = a^-b
(a^b)^c = a^(bc)
Answer:
B. 0
Step-by-step explanation:
:)
A plane flew between two cities at 330 mph, a car went the same distance at 55 mph . If the car took 7.5 hours longer how far apart were the two cities
Answers
Answer:
The cities are 495 miles apart.
Step-by-step explanation:
Let x represent the distance between the two cities.
Let t represent the time taken by the plane to fly between the two cities.
The plane flew between two cities at 330 mph.
Distance = speed × time
Distance covered by the plane would be
330 × t = 330t
A car went the same distance at 55 mph. If the car took 7.5 hours longer, means that the time spent by the car would be (t + 7.5) hours and distance travelled would be
55(t + 7.5) = 55t + 412.5
Since the distance is the same, then
330t = 55t + 412.5
330t - 55t = 412.5
275t = 412.5
t = 412.5/275
t = 1.5
the distance between the two cities would be
1.5 × 330 = 495 miles
Stephen and Rocco were playing video games Stephen scored 2,500 points which is 5 time's as many points as Rocco scored how many points did Rocco score
Answers
Answer:
500 points
Step-by-step explanation:
Rocco scored 1/5 as many points as Stephen, so scored ...
(1/5) × (2500 points) = 500 points
Rocco scored 500 points.
"A serving of fish contains 50 g protein and 4 g of fat. If protein has a caloric value of 4 kcal/g and fat has 9 kcal/g, how many kcal are in the serving?"
Answers
The total caloric content in the serving of fish can be calculated by adding the calories from protein (200 kcal) and the calories from fat (36 kcal). Therefore, the serving of fish contains a total of 236 kcal.
Explanation:To calculate the total calories in a serving of fish, we need to add the caloric content of both the protein and the fat. The protein content of the fish is 50 g, and we know that protein has a caloric value of 4 kcal/g. Thus, the total caloric content from protein is 50 g x 4 kcal/g = 200 kcal. The fat content of this serving of fish is 4 g, and fat has a caloric value of 9 kcal/g. This makes the total caloric content from fat 4 g x 9 kcal/g = 36 kcal.
To find the total caloric content of the serving, we need to add together the calories from protein and fat. So, 200 kcal + 36 kcal = 236 kcal. Therefore, the serving of fish contains a total of 236 kcal.
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The distribution of the number of hours people spend at work per day is unimodal and symmetric with a mean of 8 hours and a standard deviation of 0.5 hours. 95% of all people work between ___ and ___ hours per day? a.7 and 9 hours (T/F)
Answers
Answer: 95% of all people work between 7 hours and 9 hours per day and It is true.
Step-by-step explanation:
Since we have given that
Mean = 8 hours
Standard deviation = 0.5 hours
According to Empirical Rule,
at 95% confidence, it lies within 2 standard deviations from the mean
so, lower value is given by
[tex]mean-2\times sd\\\\=8-2\times 0.5\\\\\=8-1\\\\=7\ hours[/tex]
upper value is given by
[tex]mean+2\times s.d\\\\=8+2\times 0.5\\\\=8+1\\\\=9\ hours[/tex]
Hence, 95% of all people work between 7 hours and 9 hours per day.
Therefore , it is true.
Final answer:
95% of people work between 7 and 9 hours per day according to the empirical rule of the normal distribution. The statement is true.
Explanation:
The distribution of the number of hours people spend at work per day is unimodal and symmetric with a mean of 8 hours and a standard deviation of 0.5 hours. Since the distribution is symmetric, and we are looking for the range that includes 95% of the distribution for a standard normal distribution, we can use the empirical rule. The empirical rule states that approximately 95% of the data in a normal distribution falls within two standard deviations of the mean.
To find the range, we calculate as follows:
Lower bound = Mean - 2(Standard Deviation) = 8 - 2(0.5) = 7 hoursUpper bound = Mean + 2(Standard Deviation) = 8 + 2(0.5) = 9 hoursTherefore, 95% of all people work between 7 and 9 hours per day. The statement is true.
Evaluate the amount of work done by the force field F(x,y)=1x2i+yexjF(x,y)=1x2i+yexj on a particle that moves along the curve C:x=y2+1C:x=y2+1 from (1,0)(1,0) to (2,1)(2,1).
Answers
Answer:
[tex]\frac{7}{3} + \frac{e^2 - e}{2}[/tex]
Step-by-step explanation:
By definition:
Work done along the path is the line integral along that path denoted as:
Work Done = [tex]\int\limits^C {F} \, dr[/tex]
Note: dr = dx i + dy j
Given that: [tex]F (x,y) = x^2 i + ye^x j[/tex]
F (x, y) dot product with dr = [tex] x^2 dx + ye^x dy[/tex]
Work done = [tex]\int\limits^C {(x^2 dx + ye^x dy)}[/tex] ... Eq 1
Given that C: [tex]y = \sqrt{x-1}[/tex]
[tex]dy = \frac{dx}{2\sqrt{x-1} }[/tex]
Replace the value of y and dy in Eq 1
[tex]Work done = \int\limits^C ({x^2 + \frac{e^x}{2} }) \, dx[/tex]
Limits of x are 1 to 2 respectively
[tex]Work done = \int\limits^2_1 ({x^2 + \frac{e^x}{2} }) \, dx[/tex]
= [tex](\frac{x^3}{3} + \frac{e^x}{2})\limits^2_1[/tex]
Evaluate limits to obtain
Work Done = [tex]\frac{7}{3} + \frac{e^2 - e}{2}[/tex]
A pet store has 19 goldfish tanks. The store can place 12 fish in each tank. How many goldfish can it keep? Write a division equation with a variable.
Answers
The division equation is: [tex]\frac{x}{19} = 12[/tex]
228 goldfish can be kept
Solution:
Given that,
A pet store has 19 goldfish tanks
The store can place 12 fish in each tank
Let "x" be the number of gold fish that can be kept in tank
From given information,
Number of goldfish tanks = 19
Number of fish kept in 1 tank = 12 fish
We know that,
number of gold fish that can be kept in tank = Number of goldfish tanks x Number of fish kept in 1 tank
[tex]x = 19 \times 12[/tex]
[tex]\frac{x}{19} = 12[/tex]
Thus the division equation is found
On solving we get,
x = 19 x 12 = 228
Thus 228 goldfish can be kept
Jessica is walking home from a friend's house. After two minutes she is 1 mile from home. Twelve minutes after leaving, she is 0.5 miles from home. What is her rate in miles per hour?
Answers
Step-by-step explanation:
In ten minutes she walked 1-0.5=0.5 miles.
60 minutes/10 minutes=6. So 0.5 miles ×6=3 miles per hour