Answer:
-6 ± √78\6 [0.47196014..., -2.47196014... = x]
Step-by-step explanation:
The roots [zeros] are the x-values where the graph intersects the x-axis. To find the roots (zeros), replace y with 0 and solve for x.
Answer:
x = 1 + √74/6 or x = 1 - √74/6
Step-by-step explanation:
Points to remember
Zeros of a quadratic equation ax² + bx + c = 0
x = [-b ± √(b² - 4ac)]/2a
To find the zeros of given quadratic equation
It is given that,
6x² +12x - 7 = 0
Here a = 6, b = -12 and c = -7
x = [-b ± √(b² - 4ac)]/2a
= [-12 ± √(12² - 4*6*(-7))]/2*6
= [12 ± √(144 +168 )]/12
= [12 ± √312]/12
= [12 ± 2√74]/12
= 1 ± √74/6
x = 1 + √74/6 and x = 1 - √74/6
which expression is equivalent to (look at picture)
For this case we must indicate an expression equivalent to:
[tex](2 ^ 3) ^ {-5}[/tex]
By definition of power properties we have to:
[tex](a ^ n) ^ m = a ^ {n * m}[/tex]
We also have to:
[tex]a ^ {- 1} = \frac {1} {a ^ 1} = \frac {1} {a}[/tex]
Rewriting the expression we have:
[tex](2 ^ 3) ^ {-5} = 2 ^ {-15} = \frac {1} {2 ^ {15}}[/tex]
Answer:
Option A
What is the solution to the system of equations? y = x + 3 x = –2
Answer:
(-2, 1)
Step-by-step explanation:
Just substitute -2 for x in y = x + 3: y = -2 + 3 = 1. So the solution is (-2, 1).
Answer:
Solution of the system of equations
y = x + 3
x = –2 is:
(-2,1)
Step-by-step explanation:
We have to find the solution of the system of equations:
y = x + 3
x = –2
Solution means values of x and y
x= -2
Putting it in equation y=x+3
⇒ y= -2+3
⇒ y= 1
Hence, solution of the system of equations
y = x + 3
x = –2 is:
(-2,1)
What is x3+3x2−16x−48 divided by x−1?
Answer:
x² + 4x - 12, remainder - 60
Step-by-step explanation:
Using synthetic division to divide
Since dividing by x - 1, evaluate for x = 1
1 | 1 3 - 16 - 48
↓ 1 4 - 12
---------------------------
1 4 - 12 - 60 ← degree 2 polynomial
quotient = x² + 4x - 12, remainder = - 60
Hence
[tex]\frac{x^3+3x^2-16x-48}{x-1}[/tex] = x² + 4x - 12 - [tex]\frac{60}{x-1}[/tex]
The division of the given polynomials x³ + 3x² - 16x - 48 by x - 1 using synthetic division results in the polynomial x² + 4x - 12 - 60/(x - 1) with a remainder of -60.
Explanation:The division of two polynomials can be performed using polynomial long division or synthetic division. In this case, we have a cubic polynomial divided by a linear polynomial: x³ + 3x² - 16x - 48 divided by x - 1.
We can use synthetic division to solve this. Place the coefficients of the dividend (1, 3, -16, -48) in a row and place the zero from the divisor (x - 1= 0, x = 1) to the left. Add down the columns and multiply the result by x in each row, placing the result in the next row.
Following these steps, the coefficients become 1, 4, -12, and -60 which translates to the polynomial x² + 4x - 12 - 60/(x - 1). The remainder (-60) divided by the divisor (x - 1) is added as the last term.
Learn more about Polynomial Division here:https://brainly.com/question/36507743
#SPJ11
Which ordered pair describes the location of the point shown on the coordinates system below
Answer:
Option D (-1,-2)
Step-by-step explanation:
we know that
The ordered pair is 1 unit to the left of the origin and 2 units down from the origin
so
(x,y) ------> (0-1,0-2)
(x,y) ------> (-1,-2)
therefore
The coordinates of the ordered pair is (-1,-2)
Answer: c: (-1,-2)
Step-by-step explanation:
Just got it right on the quiz
A box contains 7 plain pencils and 3 pens. A second box contains 3 color pencils and 3 crayons
One item from each box is chosen at random. What is the probability that a pen from the first
box and a crayon from the second box are selected?
Write your answer as a fraction in simplest form.
Answer:
[tex]\frac{3}{20}[/tex]
Step-by-step explanation:
Box 1:
Number of pens = 3
Total number of items = pencils + pens = 7 + 3 = 10
Probability that a pen will be picked, P(Pen) = [tex]\frac{3}{10}[/tex]
Box 2:
Number of crayons = 3
Total number of items = color pencils + crayons = 3 + 3 = 6
Probability that a crayon will be picked, P(Crayon) = [tex]\frac{3}{6}[/tex]
P(pen from 1st box and crayon from 2nd box),
= P(Pen) x P(Crayon)
= [tex]\frac{3}{10}[/tex] x [tex]\frac{3}{6}[/tex]
= [tex]\frac{3}{20}[/tex]
Which pairs of angles in the figure below are verticle angles? Check all that apply.
Answer:
correct answer options are ; C and D
Step-by-step explanation:
By definition, vertical angles are those that are opposite each other when two lines cross and are equal.
Observing the given options;
C. ∠LRE and ∠FRA
D.∠TRF and ∠NRL
In the other options given, it could have been correct if stated as;
A. ∠ARS and ∠ERO
B. ∠NRA and ∠TRE
A system of equations has no solution. If y= 8x + 7 is one of the equations which could be the other equation?
y= 8x+7
y = 8x-7
y=-8x+ 7
y=-8x-7
Answer:
y = 8x - 7Step-by-step explanation:
If two equations are the same, then the system of equations has infinitely many solutions.
If two equations different only constant number, then the system of equations has no solution (coefficient at x in both equations is the same and coefficient at y is the same).
Therefore for y = 8x + 7 other equation is y = 8x - 7.
Two cars leave the same location at 2:00 P.M. If one
car travels north at the rate of 30 m.p.h. and the
other travels east at 40 m.p.h., how many miles apart
are the two cars at 4:00 P.M.?
A) 50
B) 100
C) 120
D) 140
Answer:
Step-by-step explanation:
A bird is flying northeast. In the same time it flies 3/5 mile east, it flies 5/6 mile north. How many miles does the bird fly east for every mile it travels north.
Answer:
9/20 miles
Step-by-step explanation:
we know that
if the bird flies 5/6 miles north for -------------> 3/8 miles east
then
for 1 mile north------------------------------> X miles east?
X=(3/8)/(5/6)-------> 18/40-------> 9/20 miles
the answer is
9/20 miles
The bird flies 18/25 miles east for each mile travelled north.
The question is asking for the ratio of the distance a bird flies east to the distance it flies north. Given that the bird flies 3/5 mile east and 5/6 mile north, we can set up a ratio to express the distance flown east per mile flown north. This is a straightforward ratio problem, where we divide the distance east by the distance north to find the required ratio.
To find the number of miles the bird flies east for every mile it travels north, we can set up the following ratio:
Distance East / Distance North = (3/5) miles / (5/6) miles
To simplify this, we multiply by the reciprocal of the denominator, resulting in:
(3/5) * (6/5) = 18/25.
So, the bird flies 18/25 miles east for every mile it travels north.
Find the slope of the line
A. 4/3
B. -4/3
C. -3/4
D. 3/4
Answer:
-3/4
Step-by-step explanation:
You could identify two points and used the slope formula given two points.
OR
You can just count from one point to another.
First step: Identify two points where the line crosses nicely.
I see one at the y-intercept (0,1) and another at (4,-2). So starting at the y-intercept, how much do we need to travel down to get to (4,-2). Hopefully you say down 3, so the rise is -3. Now how much to the right after traveling down 3 from (0,1) to we need to travel to get to (4,-2) . Count the spaces...4 units right so the run is 4.
The slope is -3/4
How do you solve this?
[tex]\dfrac{1}{4}+x=\dfrac{20}{3}\Big|\cdot12\\\\3+12x=80\\\\12x=77\\\\x=\dfrac{77}{12}[/tex]
Answer:
x = 77/12 or 6 5/12
Step-by-step explanation:
To solve this one step equation you have to isolate the variable. To isolate the variable you need to to do the inverse of addition which is subtraction.
So you have to subtract 1/4 by 1/4
And what you do to one side of the equation you have to do to the other side.
So 20/3 - 1/4 = 77/12
So x = 77/12 or change it to a mixed number 6 5/12.
Hope this helped you!!
I don't know why the answer can be 3 OR 7. Please help me.
Answer:
see explanation
Step-by-step explanation:
Calculate the distance (d) using the distance formula
d = √ (x₂ - x₁ )² + (y₂ - y₁ )²
with (x₁, y₁ ) = (3, 5) and (x₂, y₂ ) = (1, a)
d = [tex]\sqrt{(1-3)^2+(a-5)^2}[/tex]
= [tex]\sqrt{(-2)^2+(a-5)^2}[/tex]
= [tex]\sqrt{4+(a-5)^2}[/tex]
Equating d to [tex]\sqrt{8}[/tex], gives
[tex]\sqrt{4+(a-5)^2}[/tex] = [tex]\sqrt{8}[/tex]
Squaring both sides
4 + (a - 5)² = 8 ( subtract 4 from both sides )
(a - 5)² = 4 ( take the square root of both sides )
a - 5 = ± [tex]\sqrt{4}[/tex] = ± 2 ( add 5 to both sides )
a = 5 ± 2, that is
a = 5 - 2 = 3 OR a = 5 + 2 = 7
Parallel lines t and u are cut by two transversals, r and s, which intersect line u at the same point.
What is the measure of angle 2?
25°
42°
46°
88°
Answer:
Second option.
Step-by-step explanation:
The angle [tex](3x+17)\°[/tex] and the angle [tex](4x-8)\°[/tex] are alternate exterior angles, then they are congruent. So we can can find "x":
[tex]3x+17=4x-8\\17+8=4x-3x\\x=25[/tex]
Then, the angle [tex](4x-8)\°[/tex] is:
[tex](4x-8)\°=(4(25)-8)\°=92\°[/tex]
You can observe that the angle identified in the figure attached as "3" and the angle 46° are Alternate interior angles, then they are congruent.
Since the sum of the measures of the angles that measure 92°, 46° and the angle "2" is 180°, we can find the measure of the angle "2" by solving this expression:
[tex]92\°+46\°+\angle 2=180\°\\\\\angle 2=180\°-92\°-46\°\\\\\angle 2=42\°[/tex]
Answer:I agree that 46 is correct
Step-by-step explanation:
if there is no real number solution to the quadratic equation x^2+2x+c=0 what is a possible value of c?
1
-2
0
3
Answer:
The possible value of 'x' is: 3.
Step-by-step explanation:
A polynomial has no real solutions when the discriminat is less than zero. Given the following polynomial: [tex]ax^{2} +bx+c = 0[/tex] the discriminant is given by: [tex]Discriminant = b^{2}-4ac[/tex]
In this case, a=1, b=2. By substituting those values:
[tex]Discriminant = 2^{2}-4(1)c[/tex] ⇒ [tex]Discriminant = 4-4c[/tex]
Given that the discriminant should be less tha zero, then 'c' must be greater than one.
In this case, the only possible value of 'x' is: 3.
Answer:
3
Step-by-step explanation:
Given
x² + 2x + c = 0 ← in standard form
with a = 1, b = 2 and c = c
If there are no real solutions then the discriminant
b² - 4ac < 0, that is
2² - (4 × 1 × c ) < 0
4 - 4c < 0 ( subtract 4 from both sides )
- 4c < - 4
Divide both sides by - 4, reversing the sign as a consequence
c > 1
Hence a possible value of c is 3
The Nolansky family has saved $360 as a down payment for a new computer. If x is the monthly payment for one year, the expression $12x + $360 represents the total cost of the computer. Factor this expression
Answer:
$504
Step-by-step explanation:
since there is 12 months in a year , the family would pay 12$ a year.
12x12= 144
then since they paid a down payment of $360
360+144=504
so they would have paid $504
Answer:
After factorization of given expression we get 12( x + 30 ).
Step-by-step explanation:
Given:
Money Saved by Nolansky family for down payment = $ 360
x is the monthly payment for 1-year
Expression Representing the total cost of the computer = 12x + 360
To find: Factors of the given expression.
We need to factor the given expression. We do it by taking the common factor of both the term.
Consider,
12x + 360
= 2 × 2 × 3 × x + 2 × 2 × 2 × 3 × 3 × 5
= 2 × 2 × 3 × ( x + 2 × 3 × 5 )
= 12 × ( x + 30 )
= 12 ( x + 30 )
Therefore, After factorization of given expression we get 12( x + 30 ).
Which function could be a stretch of the exponential decay
function shown on the graph?
f(x) = 2(6)
f(x) = 1/2(6)
f(x) = 2[1/6]
f(x) = 1/2[1/6]
Answer:
(x) = 2(1/6)^x
Step-by-step explanation:
To easily solve this problem, we can graph each option using a graphing calculator, or any equation plotting tool.
Case 1
f(x) = 2(6)^x
Case 2
f(x) = 1/2*(6)^x
Case 3
f(x) = 2(1/6)^x
Case 4
f(x) = 1/2*(1/6)^x
By looking at the pictures below, we can tell that the correct option is
Case 3
f(x) = 2(1/6)^x
Since the stretch is done by a factor of 2
A bird flies at an elevation of 10 feet. Which is closer to sea level than the bird?
a fish swimming at an elevation of –18 feet
a boy swimming at an elevation of –3 feet
a kite flying at an elevation of 30 feet
a bird sitting in a tree at an elevation of 12 feet
A boy swimming at an elevation of 3 feet below sea level. This is the answer because the boy is only 3 feet away from sea level while the bird is 10 feet away form sea level.
Answer:
B. A boy swimming at an elevation of –3 feet.
Step-by-step explanation:
We have been given that a bird flies at an elevation of 10 feet. We are asked to choose the elevation that is closer to sea level than the bird.
Let us find absolute value of each elevation.
A. A fish swimming at an elevation of –18 feet.
[tex]|-18|=18[/tex]
The fish is 18 feet away from sea level.
B. A boy swimming at an elevation of –3 feet.
[tex]|-3|=3[/tex]
The boy is 3 feet away from sea level.
C. A kite flying at an elevation of 30 feet.
[tex]|30|=30[/tex]
The kite is 30 feet away from sea level.
D. A bird sitting in a tree at an elevation of 12 feet
[tex]|12|=12[/tex]
The bird is 12 feet away from sea level.
Since the distance between the boy swimming and sea level is less than other distances, therefore, the boy is closer to sea level than the bird.
The variable z is directly proportional to x, and inversely proportional to y. When x is 4 and y is 13, z has the value 1.2307692307692. What is the value of z when x= 9, and y= 20
Answer:
Step-by-step explanation:
1.2307692307692.
The first step is to find the proportionality constant.
The formula is
z = kx/y
1.2307692307692 = k * 4/13 Multiply both sides by 13
1.2307692307692 * 13 = 4k
16 = 4*k Divide by 4
k = 16/4
k = 4
=================================
z = k*x/y
x = 9
y = 20
k = 4
z = 4 *9/20
z = 36/20
z = 1.8
Answer:
[tex]&\boxed{\text{1.800 000 000 0000}}[/tex]
Step-by-step explanation:
[tex]z \propto x\\\\z \propto \dfrac{1}{y}\\\\z \propto \dfrac{x}{y}\\\\z = k \left (\dfrac{x}{y} \right )[/tex]
Solve for k
[tex]\begin{array}{rcl}1.2307692307692& = & k\left (\dfrac{4}{13} \right )\\\\16.000000000000 & = & 4k\\k & = & 3.9999999999999\\\\z & = & 3.9999999999999\left (\dfrac{x}{y}\right )\\\end{array}[/tex]
Calculate the new value of z
[tex]\begin{array}{rcl}z & = & 3.999 999 999 9999 \left (\dfrac{9}{20}\right )\\\\& = &\boxed{\textbf{1.800 000 000 000}}\\\end{array}[/tex]
Anita Alvarez sells clothing for Toddler’s Shop. Baby blankets sell for $29.99 after a markup rate based on cost of 109%. Find the markup.
Answer:
The markup is $2.48
Step-by-step explanation:
* Lets explain the problem
- There is a cost price we don't know it
- There is a selling price we know it
- There is a markup we want to find it
- The relation between the cost price , the selling price and the markup
is ⇒ selling price - cost price = markup
∵ The percentage of the selling price is 109%
∵ The percentage of the cost price is 100%
- That means the markup rate = 109% - 100% = 9%
∵ The selling price is $29.99
- Lets use the ratio to find the cost price
∵ selling price / cost price = selling price% / cost price%
∴ 29.99 / cost price = 109 / 100
- By using cross multiplication
∴ cost price × 109 = 29.99 × 100
∴ cost price × 109 = 2999
- Divide both sides by 109
∴ cost price = $27.51
∵ The markup = selling price - cost price
∴ The markup = 29.99 - 27.51 = $2.48
* The markup is $2.48
Ricco bought bagels for 6 people. He bought enough for everyone to have two bagels. How many bagels did he buy?
Answer:
12
Step-by-step explanation:
6 people
2 bagels per person
This is a multiplication problem.
2 * 6 = 12
He bought 12 bagels.
a commercial jet and a private airplane fly from Denver to phoenix. it takes the commercial jet 1.1 hours for the flight, and it takes the private airplane 1.8 hours. the speed of the commercial jet is 210 miles per hour faster than the speed of the private airplane. Find the speed of both airplanes
The speed of the commercial jet is [tex]540mi/h[/tex] while the speed of the private airplane is [tex]330mi/h[/tex]
Step-by-step explanation:
Let's name the commercial jet as cj and private airplane as pa, so we know the following:
It takes the commercial jet 1.1 hours for the flight, so:
[tex]t_{cj}=1.1h[/tex]
It takes the private airplane 1.8 hours for the flight, so:
[tex]t_{pa}=1.8h[/tex]
The speed of the commercial jet is 210 miles per hour faster than the speed of the private airplane:
Let's name the speed of the commercial jet as [tex]v_{cj}[/tex] and the speed of the private airplane as [tex]v_{pa}[/tex], then:
[tex]v_{cj}=v_{pa}+210[/tex]
From physics we know that:
[tex]v=\frac{d}{t} \\ \\ Where: \\ \\ v: \ speed \\ \\ d: \ distance \\ \\ t: \ time[/tex]
Since the distance from Denver to phoenix is unique, then:
[tex]d_{cj}=d_{pa}=d[/tex]
Thus, from the equation [tex]v_{cj}=v_{pa}+210[/tex] and given the relationship [tex]v=\frac{d}{t}[/tex] we have:
[tex]v_{cj}=v_{pa}+210 \\ \\ \frac{d}{t_{cj}}=\frac{d}{t_{pa}}+210 \\ \\ \\ Plug \ in \ t_{cj}=1.1 \ and \ t_{pa}=1.8 \ then: \\ \\ \frac{d}{1.1}=\frac{d}{1.8}+210 \\ \\ Isolating \ d: \\ \\ d(\frac{1}{1.1}-\frac{1}{1.8})=210 \\ \\ \frac{35}{99}d=210 \\ \\ d=\frac{99\times 210}{35} \\ \\ d=594miles[/tex]
Finally, the speeds are:
[tex]\bullet \ v_{cj}=\frac{d}{t_{cj}} \\ \\ v_{cj}=\frac{594}{1.1} \therefore \boxed{v_{cj}=540mi/h} \\ \\ \\ \bullet \ v_{pa}=\frac{d}{t_{pa}} \\ \\ v_{pa}=\frac{594}{1.8} \therefore \boxed{v_{pa}=330mi/h}[/tex]
Enter the values needed to find the length EF (Simplify your answer)
Please Help Me!!!
Answer:
The missing term is 3b
Step-by-step explanation:
step 1
Find the coordinates of point F
Find the midpoint AB
[tex]F(\frac{-3a+3a}{2},\frac{b+b}{2})\\ \\F(0,b)[/tex]
step 2
Find the coordinates of point E
Find the midpoint AC
[tex]E(\frac{-3a-a}{2},\frac{b-5b}{2})\\ \\E(-2a,-2b)[/tex]
step 3
Find the distance EF
the formula to calculate the distance between two points is equal to
[tex]d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}[/tex]
substitute
[tex]EF=\sqrt{(b+2b)^{2}+(0+2a)^{2}}[/tex]
[tex]EF=\sqrt{(3b)^{2}+(2a)^{2}}[/tex]
therefore
The missing term is 3b
Answer:
its 3b thats the answer
What is the value of p ?
Answer:
p = 35
Step-by-step explanation:
180 - 125 = 55
180 - 90 = 90
55 + 90 = 145
180 - 145 = 35
p = 35
Solve for x.
Your answer must be simplified.
17r > -17
Hello :D
Answer:
[tex]\boxed{R>-1}[/tex]
The answer should have a negative sign.
Step-by-step explanation:
First, you do is divide by 17 from both sides of an equation.
[tex]\frac{17r}{17}>\frac{-17}{17}[/tex]
Then, you simplify and solve to find the answer.
[tex]-17\div17=-1[/tex]
[tex]\boxed{R>-1}[/tex], which is our answer.
I hope this helps you!
Have a great day! :D
Answer: [tex]r>-1[/tex]
Step-by-step explanation:
Given the inequality provided [tex]17r > -17[/tex], you need to solve for "r".
To do this, you can divide both sides of the inequality by 17. Then you get the following solution:
[tex]17r > -17\\\\\frac{17r}{17}>\frac{-17}{17}\\\\(1)r>(-1)\\\\r>-1[/tex]
Now, you can expressed this solution in Interval notation form.
Therefore, the solution of the inequality in Interval notation is:
[tex](-1, \infty)[/tex]
twelve friends share 4 bread rolls equally what fraction of a bread roll does each friend get
Answer:
Each friend will get 1/3 of a bread roll.
4 bread rolls. and 12 friends.
So 4/12 = 1/3.
Hope it helps..........
Step-by-step explanation:
Answer:
1/3 is the answer.
Step-by-step explanation:
There are 12 people, and 4 bread rolls. Each person would therefore get
4 bread rolls/ 12 people, so each person would get 1/3 of a bread roll.
What’s the answer ? Plz help
Answer:
Option C
Step-by-step explanation:
we know that
The solution of the system of inequalities is the shaded area above the dashed line y=4 and above the dashed line y=x
therefore
The system of inequalities is equal to
y>4
y>x
Need help!!!
In the diagram of circle o, what is the measure of ABC?
Answer:
54 degrees
Step-by-step explanation:
I would turn this into a quadrilateral by connecting C to O and O to A.
The angles of a quadrilateral add up to 360 degrees.
So we have 90+90+126+angleABC=360
180+126+angleABC=360
306+angleABC=360
angleABC=360-306=54
Answer:
ABC = 54°
Step-by-step explanation:
Two tangent have been drawn from an external point B to the circle O.
These tangents touch the circle at points A and C.
Now as per Theorem of arcs and angles.
∠ABC = [tex]\frac{1}{2}[/tex] [m(major arc AC) - m(minor arc AC)]
= [tex]\frac{1}{2}[/tex] [234 - 126]
= [tex]\frac{1}{2}[/tex] × (108)
= 54°
Therefore, ABC = 54°
Declan draws triangle WXY. He then constructs a perpendicular bisector from vertex W that intersects side XY at point Z. What can Declan conclude, based on his drawing?
Answer:
YZ = XZ
Step-by-step explanation:
Perpendicular Bisector:
A perpendicular bisector of a line segment 'l' is a line that is perpendicular to the line segment 'l' and cuts the line segment 'l' into two equal parts.
Given:
1. A triangle WXY.
2. A perpendicular bisector from vertex W that intersects XY at point Z.
Conclusion based on the drawing:
a. Z is the midpoint of the line segment XY because point Z lies on the perpendicular bisector of XY.
b. Hence, XZ = YZ.
Answer:
Option D.
Step-by-step explanation:
Given information: WXY is a triangle.
Steps of construction:
1. Draw a triangle WXY.
2. Constructs a perpendicular bisector from vertex W that intersects side XY at point Z.
If a line cuts a line segment exactly in half by a 90 degree angle, then it is called a perpendicular bisector.
WZ is a perpendicular bisector on XY. It means point Z divides the side XY in two equal parts.
[tex]YZ=XZ[/tex]
Therefore, the correct option is D.
Round 0.625 to the nearest hundredths
0.625 rounded to the nearest hundredth is 0.63
2 is in the hundredths place, and since the next number is 5 the 2 is rounded up one number giving you 0.63
WILL GIVE BRAINLIEST
What is the lateral surface area of a cone that has a slant height of 24 cm and a diameter of 10.5 cm? (Recall the formula LA=pi rl)
96 pi cm ^2
126 pi cm ^2
132 pi cm ^2
252 pi cm ^2
Answer:
Option B is correct.
Step-by-step explanation:
Lateral surface area of cone = π*r*l
where r is the radius and l is the height of cone.
We are given height = l 24 cm
and diameter d = 10.5 cm
we know that radius is half of diameter i.e,
r = d/2
=> r = 10.5/2
r = 5.25
Putting the values in the formula:
Lateral surface area of cone = π*r*l
Lateral surface area of cone = π*5.25*24
Lateral surface area of cone = 126 π cm^2
So, Option B is correct.
Answer: second option.
Step-by-step explanation:
We know that we can calculate the lateral surface area of a cone with this formula:
[tex]LA=\pi rl[/tex]
Where "r" is the radius and "l" is the slant heigth.
We know that the radius is half the diameter, then the radius of this cone is:
[tex]r=\frac{10.5cm}{2}\\\\r=5.25cm[/tex]
Since we know tha radius and the slant height, we can substitute values into the formula. Therefore, we get:
[tex]LA=\pi (5.25cm)(24cm)\\\\LA=126\pi cm^2[/tex]