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2 years ago

What is the surface area of the figure? Use 3.14 for π.

Mathematics

2 answers:

fredd [130]2 years ago

6 0

Answer:

Option 3

Step-by-step explanation:

We want to work out the surface-area

This is a cylinder and the formula for the surface area of a cylinder is :

2πrh+2πr^2

^ means to the power of

The radius is 15

The length is 18

2(3.14)(15)(18) + 2(3.14){15}^2

Part 1:

(6.28)(15)(18)

(6.28)(270)

1695.6

Part 2:

First, we do the exponents,

15^2 = 225

(6.28)(225)

1413

Part 3:

1695.6 + 1413 = 3108.6

Answer: 3108.6

Hope this helps :)

KATRIN_1 [288]2 years ago

4 0

Answer 847.8cm2 because first you have to multiply 18 by 15 to get 270 then multiply 270 by 3.14 to get 847.8cm2

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Solve for x. round to the nearest hundredth if necessary.

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Answer: $x=11.47$

Step-by-step explanation:

Given the angle of 55 degrees, you know that the adjacent side is "x" and the length of the hypotenuse is 20.

Therefore, you need to remember the following identity:

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abruzzese [7]

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Step-by-step explanation:

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Step-by-step explanation:

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