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3 years ago

What is the surface area of a cylinder with a radius of 10 cm and a height of 30 cm

Mathematics

1 answer:

USPshnik [31]3 years ago

3 0

Answer:

2513.27 including the pi

Step-by-step explanation:

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vesna_86 [32]

B because it’s a random sample and it’s not biased

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3 years ago

Read 2 more answers

What is the solution (x,y) to the system of equations given? 2 x + 4 y = − 16 2x+4y=−16 2 y − x = = 16 2y−x==16

alisha [4.7K]

Answer:

(-12,2)

Step-by-step explanation:

2x + 4y = -16

2y - x = 16

Multiply the bottom part by 2.

2x + 4y = -16

4y - 2x = 32

Add the equations and the answers to the equations up, and they will equal each other.

(2x + 4y) + (4y - 2x) = -16 + 32

8y = 16

y = 2

Plug y = 2 to the 2nd equation.

2*2 - x = 16

4 - x = 16

Subtract 4 from both sides.

-x = 12

Multiply both sides by -1.

x = -12

3 0

4 years ago

Tyler has 120 linear feet of fencing to put around his garden. If he uses the fence to border a rectangular garden, what is the

Travka [436]

Answer:

The maximum area is $900\ ft^{2}$

Step-by-step explanation:

Let

x----> the length of rectangle

y---> the width of rectangle

we know that

The perimeter of rectangle is equal to

$P=2(x+y)$

we have

$P=120\ ft$

$120=2(x+y)$

$60=(x+y)$

$y=60-x$ ------> equation A

Remember that

The area of rectangle is equal to

$A=xy$ -----> equation B

substitute equation A in equation B

$A=x(60-x)$

$A=-x^{2} +60x$

This is a vertical parabola open downward

The vertex is a maximum

The y-coordinate of the vertex of the graph is the maximum area of the garden and the x-coordinate is the length for the maximum area

using a graphing tool

The vertex is the point $(30,900)$

see the attached figure

Find the value of y

$y=60-x$ -----> $y=60-30=30\ ft$

The dimensions of the rectangular garden is $30\ ft$ by $30\ ft$

For a maximum area the garden is a square

The maximum area is $900\ ft^{2}$

5 0

4 years ago

Can someone help me with this one? I'm not understanding it D:

Katen [24]

Answer:

Step-by-step explanation:

A perfect square is a number made by squaring a whole number, such as 25 which is 5². 26 however is made my soaring a decimal and is therefore not a perfect square.

5 0

3 years ago

Reflect the following points over the<br> x-axis. (-5, -3) (-2,-6) (-4,-8)

viktelen [127]

Reflect over x-axis rule: (x,y) -> (x,-y)

(-5,3) --> (-5,-3)

(-2,-6) --> (-2,6)

(-4,-8) --> (-4,8)

8 0

3 years ago

What is the surface area of a cylinder with a radius of 10 cm and a height of 30 cm￼

What is the surface area of a cylinder with a radius of 10 cm and a height of 30 cm