H=-16t^2+ 64+60, Where T is the elapsed time, in seconds

Answers

Answer 1

Answer:

The given equation is H = -16t^2 + 64t + 60, where t is the elapsed time in seconds. This equation represents the height, H, of an object thrown upward from the ground with an initial velocity of 64 ft/s.    

Step-by-step explanation:

1. The term -16t^2 represents the effect of gravity on the object. Since the coefficient is negative, it indicates that the object is moving upward against the force of gravity. The square of the time, t^2, shows that the effect of gravity increases as time passes.  2. The term 64t represents the initial velocity of the object. The coefficient 64 indicates that the object was thrown upward with an initial velocity of 64 ft/s. The time, t, shows the effect of the initial velocity on the height.  3. The constant term 60 represents any additional height above the ground at the start. It could be the height from which the object was thrown or any elevation from the ground.  By plugging different values of t into the equation, you can find the corresponding heights at different times. For example, if you substitute t = 0, the equation becomes H = -16(0)^2 + 64(0) + 60 = 60. This means that at the start (t = 0), the object is at a height of 60 feet above the ground.  To find the maximum height reached by the object, we need to determine the vertex of the parabolic equation. The vertex is given by the formula t = -b/(2a), where a and b are the coefficients of t^2 and t, respectively.  In this case, a = -16 and b = 64. Substituting these values into the formula, we get t = -64/(2(-16)) = 2 seconds. This means that the object reaches its maximum height after 2 seconds.  To find the maximum height, substitute t = 2 into the equation: H = -16(2)^2 + 64(2) + 60 = 64 feet. Therefore, the object reaches a maximum height of 64 feet above the ground after 2 seconds.  I hope this explanation helps you understand the meaning of the given equation and how to interpret it in the context of elapsed time and height. Let me know if this helped!


Related Questions

Help with two Math problems.

1: A bag of dog food weighs 20lb. 15% of the weight is oats.

a) Set up an equation OR proportion to find the weight of the oats in the dog food.

b) What is the weight of the oats in the dog food? Show your work.


2: Some students were asked what kind of animals they have at home. The results are in the image:

(a) List the animals in order of popularity from most popular to least popular.

(b) I estimated that 250 students were interviewed. Based on my estimate, how many students have an "other" pet? Show your work.

Answers

Answer:

1. a. o = 3b

b. o = 3 pounds

2. a. Most popular animals:

A. Dogs - 67%

B. Cats - 20%

C. Other - 8%

D. None - 4%

E. Horses - 1%

b. 20 students

Step-by-step explanation:

1. a. The equation is:

o = 0.15 *20b

o = 3b

where, o = weight of oats in pounds and b = number of dog food bags

b. Let's find out the weight of the oats in one dog food bag, using our equation:

o = 0.15 *20b

o = 0.15 *20 * 1

o = 3 pounds

2. a. Most popular animals:

A. Dogs - 67%

B. Cats - 20%

C. Other - 8%

D. None - 4%

E. Horses - 1%

b. If 250 students were interviewed, the 8% who answered "other" are:

8% of 250 = 0.08 * 250 = 20 students


Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 69 miles per hour, with a standard deviation of 4 miles per hour. Estimate the percent of vehicles whose speeds are between 65 miles per hour and 73 miles per hour. (Assume the data set has a bell-shaped distribution)​

Answers

This is the answer, I hope it will be help

The percent of vehicles whose speeds are between 65 miles/hour and 73 miles/hour will be 68 %.

It is given that mean speed of sample of vehicles (μ) is 69 miles/hour and standard deviation is 4 miles/hour.

We have to find out the percent of vehicles whose speeds are between 65 miles/hour and 73 miles/hour using the empirical rule.

What is the empirical rule if distribution lies within one standard deviation from the mean ?

The empirical rule states that for a normal distribution, 68% of the distribution are within one standard deviation from the mean.

As per the question , we have ;

Mean speed of sample of vehicles (μ) = 69 miles/hour

Standard deviation = 4 miles/hour

To find the % of vehicles , let's check where the distribution lies ;

So ;

μ - 4 ;

= 69 - 4

= 65 miles / hour

μ + 4 ;

= 69 + 4

= 73 miles / hour

Since ; it lies between μ - 4 and μ + 4 , so by using the empirical rule we get that it lies within one standard deviation.

Hence ; by the empirical rule ;

% of vehicles between speed 65 miles/ hour and 73 miles/hour = 68 %

Thus , the percent of vehicles whose speeds are between 65 miles/ hour and 73 miles/hour will be 68 %.

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what times 10 equals 0.3

Answers

Final answer:

To find out what number times 10 equals 0.3, you divide 0.3 by 10. The answer is 0.03.

Explanation:

The question you're asking is essentially what number, when multiplied by 10, equals 0.3. This is a basic division problem in mathematics, because when you want to find out what number multiplied by another number gives a certain result, you divide the result by one of the numbers.

In this case, you would divide 0.3 by 10. So, the solution to this problem is: 0.3 / 10 = 0.03.

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The number that times 10 equals 0.3 is 0.03. This exercise relates to understanding decimal places and exponents, where for instance, 10⁻³ represents 0.001 and signifies that the decimal point is shifted three places to the left.

To find what number times 10 equals 0.3, we need to solve the following equation:

x × 10 = 0.3

To find x, we divide both sides of the equation by 10:

x = 0.3 / 10

x = 0.03

Therefore, 0.03 times 10 equals 0.3.

Simplify the radical 147

Answers

Answer and Explanation: The square root of 147 is approximately 12.12436 or 7√3 in radical form. To begin, examine 147's factors. These are: 1, 3, 7, 21, 49, 147.

Hope this helped

Answer:

12.12436 or 7√3

Step-by-step explanation:

count backwards by hundreds from 1,000.

Answers

Answer:

1,000  900 800 700 600 500 400 300 200 100

Step-by-step explanation:

1,000 900 800 700 600 500 400 300 200 100 0

Explanation:
1,000-100
900-100
800-100
700-100
600-100
500-400
300-200
100-100
0

Use the drop-down menus to complete the statement about the inequality m ≥ 2.

Answers

Answer:

The inequality m ≥ 2 has infinity many solutions because 2 and any number to the right of 2 on the number line can be substituted for m to make this inequality true.

[Question Image Attached] If you are given the graph of g (x) = log 2 x, how could you graph f (x) = log 2 x + 5?

Answers

Answer:

Translate each point of g(x) 5 units up.

Step-by-step explanation:

The given the graph of the parent function

[tex]g(x) = log_{2}(x) [/tex]

We want to use this graph to draw the graph of

[tex]f(x) = log_{2}(x) + 5[/tex]

We can observe that:

[tex]f(x) = g(x) + 5[/tex]

This means the graph of the parent function, g(x) must be shifted up 5 units.

Therefore the correct answer is A.

What is the simplified answer for 8w = 5

Answers

Answer:

w = 5/8

Step-by-step explanation:

divide by 8 to both sides to get 8/8w = 5/8

8/8 = 1, w = 5/8.

Answer:

W= 5/8

Step-by-step explanation:

divide both sides by 8

1) In the diagram, l || m. If the measure of angle 3 is 120 find the measure of the following angles

a) angle 4

b) angle 6

c) angle 8

Answers

Answer:

a) 60° , b) 120° and c) 60°

Step-by-step explanation:

See the diagram attached to this question.

a) Here, ∠ 4 and ∠ 3 are supplementary angles.

So, ∠ 4 + ∠ 3 = 180° {Here, ∠ 3 is given to be 120°}

⇒ ∠ 4 = 180° - ∠ 3 = 180° - 120° = 60° (Answer)

b) Now, ∠ 3 and ∠ 6 are alternate angles and hence, ∠ 3 = ∠ 6 = 120° (Answer)

c) Here, ∠ 6 and ∠ 8 are supplementary angles.

So, ∠ 6 + ∠ 8 = 180°

⇒ ∠ 8 = 180° - ∠ 6 = 180° - 120° = 60° (Answer)

Perry Angelo is planning to open a restaurant. He has the resources to produce and sell either hamburgers or pizzas. So he does some research
and finds that the new location has a good demand for pizza. He hires cooks, wait staff, and an accounts person for his new pizzeria. He also
arranges for materials such as pizza ingredients and pizza boxes.
Determine three factors affecting Perry's cost of making pizza. Write down the name of the factors and their instances in this scenario in the table.

Answers

Answer:

Factors Affecting Cost Factors Affecting Cost

opportunity cost: the opportunity to produce and sell    

                                                                              hamburgers

cost of materials: cost of pizza ingredients and pizza boxes

sunk cost: money spent on researching the best option

fixed cost: money for paying employees

marginal cost:the cost of baking one more pizza

Step-by-step explanation:

Final answer:

Perry Angelo's cost of making pizza is affected by the cost of ingredients, labor costs, and capital costs like the pizza oven and shop rent. These costs, along with a desired profit margin, influence the selling price.

Explanation:

The cost of producing pizza or any output involves various factors. In the scenario described for Perry Angelo's pizzeria, three significant factors affecting the cost of making pizza include:

Cost of Ingredients: This includes items like dough, sauce, cheese, and pepperoni, which are essential for making pizzas.Labor Costs: The wages paid to the cooks, wait staff, and the accounts person Perry Angelo hires.Capital Costs: Investments made in the pizza oven and other equipment necessary for the production of pizzas, as well as ongoing expenses like shop rent.

These elements contribute to the total production cost, on top of which Perry will need to add his desired profit margin to determine the selling price for the pizzas.

A town has a population of 20000 and grows at 6% every year. What will be the population after 6 years to the nearest whole number

Answers

Answer:

27200 rounded will be 30000

Step-by-step explanation:

firstly you find 1% which is 200

then you multiply by 6 to get 6%

then you multiply by 6 again to get the total

Solve the equation: x/2-18=(-28)

Answers

Answer:

x = -20

Step-by-step explanation:

First we can rearrange the equation:

[tex]\frac{x}{2}[/tex] -18 = -28

2 * [tex]\frac{x}{2}[/tex] - 18 = -28 * 2

The 2s canel out

x - 36 = - 56

x = -20

Find the coordinates of the reflected image.
A rectangle with vertices L(1, -1), M(1, -9). N(8.-9), and
(8.-1) is reflected over the y-axis.
1.)L'(-1.-1), M'(-1, -9), N'(-8.-9), and 0%(-8, -1)
2.)L (1.-1), M'(1.-9), N'(8.-9), and Oʻ(8.-1)
3.)L'(-1.–1). M?(-9,-1). N'(-9.–8). and O'(-1, -8)
4.)L'(-1. 1). M'(-1.9), N'(-8. 9), and O'(-8.1)​

Answers

Answer:

The actual answer is A or 1 as you have it.

Step-by-step explanation:

All you have to do is just map out the coordinates yourself. You're looking for a reflection that goes across the Y axis, but NOT across the X axis.

Hope this helps you and anyone looking for an answer to their headache.

Final answer:

The reflected coordinates of the rectangle over the y-axis are L'(-1, -1), M'(-1, -9), N'(-8, -9), and O'(-8, -1), matching option 1.

Explanation:

The student is asking about finding the coordinates of a rectangle's vertices after it has been reflected over the y-axis. Reflecting a shape over the y-axis changes the sign of the x-coordinate of each vertex, while the y-coordinate remains the same. So, if we have a point (x, y), the reflected point over the y-axis would be (-x, y). Applying this to the rectangle's vertices we have:

For L(1, -1), the reflection L' would be (-1, -1).

For M(1, -9), the reflection M' would be (-1, -9).

For N(8, -9), the reflection N' would be (-8, -9).

For O(8, -1), the reflection O' would be (-8, -1).

Therefore, the correct reflected coordinates are L'(-1, -1), M'(-1, -9), N'(-8, -9), and O'(-8, -1), which corresponds to option 1.

Charlotte uses a 50% off coupon when she buys a dress the original price of the dress is $45 how much money does Charlotte save by using the coupon​

Answers

Answer: $22.50

Step-by-step explanation:

Since the price is 50% off, you need to find half of 45. 45/2 is 22.5, so she saves $22.50

Camacho is buying a monster truck. The price of the truck is xxx dollars, and he also has to pay a 13\%13%13, percent monster truck tax.
Which of the following expressions could represent how much Camacho pays in total for the truck?

Answers

Answer:

Camacho pays in total for the monster truck = $x + $0.13x = $1.13x

Step-by-step explanation:

i.) The price of truck is $x

ii.) Monstor truck tax  = 13% of price of truck = [tex]\frac{13}{100}\times $x[/tex] = $0.13x

iii) Camacho pays in total for the monster truck = $x + $0.13x = $1.13x

Options A and D correctly represent how much Camacho pays in total for the truck:

A. (1 + 0.13)x

D. 1.13x

The total amount Camacho pays for the monster truck includes the price of the truck plus the tax, which is 13% of the price of the truck. Therefore, the total amount can be represented by the expression:

[tex]\[ \text{Total amount} = \text{Price of the truck} + \text{Tax amount} \][/tex]

Given that the price of the truck is x dollars and the tax is 13\% of the price, we can represent the tax amount as 0.13x .

So, the total amount Camacho pays is:

[tex]\[ \text{Total amount} = x + 0.13x \][/tex]

[tex]\[ \text{Total amount} = 1.13x \][/tex]

Therefore, options A and D correctly represent how much Camacho pays in total for the truck:

A. (1 + 0.13)x

D. 1.13x

The complete Question is given below:

Camacho is buying a monster truck. The price of the truck is x dollars, and he also has to pay a 13% monster truck tax. Which of the following expressions could represent how much Camacho pays in total for the truck? Choose 2 answers:

A. (1+0.13)x

B. 13x/100

C. 13x

D. 1.13x

E .13x+x

what are the two values of x that are roots of this equation x^2+3x-6=0​

Answers

Answer:

x = - 3 - √33 / 2

x = + 3 + √33 /2

or

x=1.37228132...

x=−4.37228132...

Step-by-step explanation:

Final answer:

The two values of x that are roots of the equation x^2+3x-6=0 are approximately x ≈ -4.16 and x ≈ 1.16.

Explanation:

To find the two values of x that are roots of the equation x^2+3x-6=0, we can use the quadratic formula. The formula is:

x = (-b ± √(b^2 - 4ac)) / 2a

In this case, a = 1, b = 3, and c = -6. Plugging in these values, we get:

x = (-3 ± √(3^2 - 4(1)(-6))) / 2(1)

Simplifying further:

x = (-3 ± √(9 + 24)) / 2

x = (-3 ± √33) / 2

So the two values of x that are roots of the equation are approximately x ≈ -4.16 and x ≈ 1.16.

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A study indicated that the citizens of Newport wasted 38,080 gallons of water last year. This year they wasted 20% less. How many gallons did the citizens wasted this year

Answers

Answer : 30,464

Method : 20% less as a multiplier is 0.8.
This is because percent is out of 100. But when converted to a decimal it is divided by 100. So a whole number is 1. But 20% less is 1 - 0.2 which equals 0.8.
Then you times the value by the multiplier to get the answer.
Therefore, it should be
38,080 x 0.8 = 30,464

What is the solution to this system of equations?

2x - y = 8
x + y = 4
A. (2, -4)
B. (4, 0)
C. (6, 4)
D. (12, -8)

Answers

Answer:

Answer is B. (4,0)

Step-by-step explanation:

2x - y = 8

x + y = 4

solve the equation

2x - y = 8

y = 4 - x

substitute the value of y into the equation

2x - (4 - x) = 8

solve the equation

x = 4

substitute the value of x into an equation

y = 4 - 4

solve the equation

y = 0

answer is (4,0)

The loan that Nate and Isaac got from their parents was at 2% interest for one year. How much will the boys pay in interest on their loan of \$2,500 ? Show your work .

Answers

Answer: they will have to pay 50 dollars

Step-by-step explanation: you have to multiply 2,500 by 0.02 as it is the same as a percent then you should get 50

Write a numerical expression representing the following statement:
"four times the sum of sixty-seven plus forty"

Answers

Answer:

47 + 40 x 4

Step-by-step explanation:

sum is adding 2 numbers together and you would then multiply 4 after adding :)

im really stuck :( can someone please help me ? it would mean a lot

Answers

Answer:

Step-by-step explanation:

Populations is who is surveyed or what the questions is targeting. More specifically who. That would be households with a car.

Use what I put as the definition for population to answer the other questions!

Pam has 24 pencils and 6 erasers. How many times as many pencils as erasers does Pam have?

Answers

Answer:

Pam had 4 times as many pencils as erasers

Step-by-step explanation:

24 pencils

6 erasers

24 pencils = x * 6 erasers

Divide by 6 on both sides to isolate x

x = 4

Pam had 4 times as many pencils as erasers

Hope this helps :)

Solve this system of equations using the substitution method. If the system of equations
does not have one solution, indicate whether the system has no solution or infinitely
many solutions.
3x+y=5
4x + 2y = 20

Answers

Answer:

well i dont really get ehat yours saying but the qustions are

3x+y=5

3^1+1=5

and then

4z+2y=20

i think

4^6+2^6=20

Step-by-step explanation:

How to write a point slope form of the equation of a line with a slope of -4 and passes through the point (1,6)?

Answers

The point slope form of a line is:
y - y1 = m(x - x1)

The values we have are:
x1 = 1
y1 = 6
m = -4

Plug in the values into the equation
y - 6 = -4(x - 1)

To make into slope form, it is the following:
y - 6 = -4(x - 1)
y - 6 = -4x + 4
y = -4x + 10

Answer:

y-6=-4(x-1)

Step-by-step explanation:

y-y1=m(x-x1)

y-6=-4(x-1)

-3 x [75/(9 - 4)^2]^2 simplify

Answers

Answer:

[tex]-27x[/tex]

Step-by-step explanation:

Given Equation:

                    [tex]-3 x [75/(9 - 4)^2]^2[/tex]

On simplifying the equation:

               [tex]=-3 x [75/(9 - 4)^2]^2\\=-3 x [75/(5)^2]^2\\=-3 x [75/25]^2\\=-3 x [3]^2\\=-3x*9\\=-27x[/tex]

The value of 'x' can be find by equating the simplified value to some certain value according to the equation.

Beginning from a depth of 35 feet below the surface, a whale swims
upward and jumps to a height of nearly 17 feet above the surface.
a. Model with Math Use an inequality to model the possible change in the number of feet, r, of the whale's elevation.
b. Solve the inequality. Explain the meaning in terms of the situation.​

Answers

a. The inequality that models the possible change in the number of feet, r, of the whale's elevation is: 35 - r ≤ 17.

This inequality represents the starting depth of 35 feet below the surface (35), minus the possible change in elevation (r), which should be less than or equal to the maximum height the whale jumps, which is nearly 17 feet above the surface (17).

b. By solving the inequality 35 - r ≤ 17, we can find the range of possible values for r.

First, subtract 35 from both sides of the inequality: -r ≤ 17 - 35. Simplifying further, we have -r ≤ -18. Then, multiply both sides by -1, remembering to reverse the inequality direction: r ≥ 18.

The solution to the inequality is r ≥ 18, meaning that the possible change in the number of feet of the whale's elevation must be equal to or greater than 18. This implies that the whale's jump cannot be less than 18 feet above the surface.

Therefore, the whale's elevation can change by any value equal to or greater than 18 feet, allowing it to jump to a height of nearly 17 feet above the surface.

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a) The inequality can be written as 35 - r ≤ 17. b) The solution to the inequality is r ≥ 18, which means that the change in the number of feet, r, of the whale's elevation must be greater than or equal to 18.

a.

Since the whale swims upward and jumps to a height of nearly 17 feet above the surface, we can represent the change in elevation as r.

The inequality can be written as:

35 - r ≤ 17

Here, 35 represents the starting depth below the surface, and 17 represents the height above the surface that the whale reaches.

By subtracting r from the starting depth, we account for the possible decrease in elevation as the whale swims upward.

b. To solve the inequality, we can isolate r on one side of the equation:

35 - r ≤ 17

Adding r to both sides of the inequality:

35 - r + r ≤ 17 + r

35 ≤ 17 + r

Subtracting 17 from both sides:

35 - 17 ≤ 17 + r - 17

Simplifying further:

18 ≤ r

Therefore, the solution to the inequality is r ≥ 18.

In terms of the situation, the inequality r ≥ 18 means that the change in the number of feet, r, of the whale's elevation must be greater than or equal to 18.

This indicates that as the whale swims upward and jumps to a height of nearly 17 feet above the surface, the whale's elevation can increase by at least 18 feet from its starting depth of 35 feet below the surface.

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The​ _______ represents the number of standard deviations an observation is from the mean.

Answers

Answer:

The z-score represents the number of standard deviations an observation is from the mean.

Step-by-step explanation:

We want to complete the statement:

The _______ represents the number of standard deviations an observation is from the mean.

Whenever we calculate z- scores, we are finding how many standard deviations an observation is from the mean.

A z-score of 3, means an observation is 3 standard deviation above the mean.

Therefore the best complete is:

z-score.

Final answer:

The Z-score represents the number of standard deviations an observation is from the mean. It provides a comparative measure that standardizes data, making it easier to compare data from different sets.

Explanation:

The Z-score represents the number of standard deviations an observation is from the mean. In statistics, it is a way to compare the position of any observation relative to the overall distribution.

Here's an example: if a Z-score of a data point is 2, it means that the data point is 2 standard deviations above the mean. Conversely, if a Z-score of a data point is -1, it means that the data point is 1 standard deviation below the mean.

Z-scores provide a standardized way to interpret data, which makes the comparison of different data sets more straightforward and undistorted by differences in units or scales.

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A company is expanding its building area from 11,000 square feet to 14,740 square feet. What is the percentage increase of the area
of the building space?​

A. 66%
B. 37.4%
C. 3.4%
D. 34%

Answers

Option D

The percentage increase of the area  of the building space is 34 %

Solution:

A company is expanding its building area from 11,000 square feet to 14,740 square feet

To find: Percentage Increase

The percent increase is given by formula:

[tex]\text{Percent increase } = \frac{\text{Final value - Initial value}}{\text{Initial value}} \times 100[/tex]

From given,

Initial value = 11000

Final value = 14740

Substituting we get,

[tex]Percent\ Increase = \frac{14740-11000}{11000} \times 100\\\\Percent\ Increase = \frac{3740}{110}\\\\Percent\ Increase = 34[/tex]

Thus percentage increase of the area  of the building space is 34 %

the answer for this question someone answer fast pleaseeee​

Answers

Answer:

???

Step-by-step explanation:

you don't have a question to answer

In the problem 4x + 10 list a constant.​

Answers

Answer:

10

Step-by-step explanation:

Constant term consists of natural no.s or numerals

So here the constant is 10

Answer:

In the problem 4x + 10     , 10 is the constant

Step-by-step explanation:

In the problem 4x + 10     , 10 is the constant

As we know

In Algebra, a constant is a number on its own, or sometimes a letter such as a, b or c to stand for a fixed number.

Examples:

In  "x + 5 = 9", 5 and 9 are constants.

similarly

In    x+ a= b    ,  a and b are constants

so from definition of constant in algebra it is clear that

in

The problem 4x + 10     , 10 is the constant

Other Questions
Macon has 32 rocks in his collection. He has 4 times as many rocks as his brother. How many rocks does Macons brother have? Identify the action verb in each of the following sentenceFor this pottery be used to kinds of clay The story of a young athlete who takes steroids and his life and future fall apart. What is the author's purpose? True or false: even when your research does not support your hypothesis, the hypothesis has value. A middle-class customer (target) base in a region is most concerned with quality and price of products. Which of the following would be considered a best value proposition for the customers?A. a company that identifies unique features of its products without comparing it with a rival's productsB. a company that offers copycat products at low cost but an average quality compared torivalsC. a company that offers the same quality of products as rivals but at a high cost based ongreater market share and higher brand value A chemistry student needs 35.0 g of thiophene for an experiment. She has available 1.0 kg of a 14.0\%w/w solution of thiophene in ethanol Calculate the mass of solution the student should use. If there's not enough solution, press the "solution" button. Be sure your answer has the correct number of significant digits. 13. Which of the following is a key factor influencing the uptake of contaminants by ingestion: a. contaminant concentration b. carcinogenic potential c. volatility d. partition coefficient 1 A committee of 9 members is voting on a proposal. Each member casts a yea or nay vote. On a random voting basis, what is the probability that the proposal wins by a vote of 7 to 2? You book a hotel online, and the registration process is clear and streamlined. This is an example of a(n) ______________ process that has _______________. economic importance of scorpion Determine what type of observational study is described. Explain. Vitamin D is important for the metabolism of calcium and exposure to sunshine is an important source of vitamin D. A researcher wanted to determine whether osteoperosis was associated with a lack of exposure to sunshine. He selected a sample of 250 women with opteoperosis and an equal number of women without osteoperosis. The two groups were matched in other words they were similar in terms of age, diet, occupation, and exercise levels. Histories on exposure to sunshine over the previous twenty years were obtained for all women. The total number of hours that each woman had been exposed to sunshine in the previous twenty years was estimated. The amount of exposure to sunshine was compared for the two groups. a.cohort; Individuals are observed over a long period of time. b.cross-sectional; Information is collected at a specific point in time. c.retrospective; Individuals are asked to look back in time Question 15 4 pts If it takes about 8 minutes for light to travel from the Sun to Earth, and Pluto is 40 times this distance from us, how long does it take light to reach Earth from Pluto? An electronics firm sells four models of stereo receivers, three CD decks, and six speaker brands. When the three types of components are sold together, they form a "system." How many different systems can the electronics firm offer?A. 169B. 72C. 13D. 36 Gilbert notices that his sausage is sliced into six pieces, whereas his brother's is sliced into nine pieces. He understands, however, that his brother's sausage is not actually any larger than his own. This indicates that Gilbert has by now reached the ________ stage of development. a. sensorimotor b. conventional c. pre-operational d. concrete operational e. formal operational Joaquin reshaped the dough into another three dimensional shape that could have a circular cross section.What is one shape Juaquin could have made? Choose two of the early cell formation hypotheses and discuss their differences: Question 3 of 52 PointsWhich force is a contact force?OA. Leaves fallingB. A bicycle brakingC. A magnet pullingD. Lightning forming Which of these is the more meaningful measure of leadership effectiveness? Analytical ability Subject matter knowledge Technical skill Emotional intelligence Another thermophile, Thermus aquaticus, was isolated from a hot spring in Yellowstone National Park. It is the source of the enzyme Taq polymerase, which is used in the molecular technique called polymerase chain reaction (PCR). PCR is used to amplify sequences of DNA. What extremophile characteristic of this enzyme makes it an essential component in a PCR reaction?a. Taq polymerase is stable under acidic or alkaline conditions.b. Taq polymerase is stable under extremely cold temperatures.c. Taq polymerase is heat-stable and can withstand high temperatures.d. Taq polymerase is stable in solutions that are extremely high in salt. Earth is surrounded by a magnetic field because of