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2 years ago

Can someone help me with question 5? Show steps .. the answer choices are

Mathematics

2 answers:

frez [133]2 years ago

7 0

Answer:

Step-by-step explanation:

A=2*pi*r*h+2*pi*r*2

A=(2*pi*2*8)+(2*pi*2*2)

A=125.66

To express the answer in terms of Pi

A=125.66/pi (3.14)

A=40 pi

bulgar [2K]2 years ago

3 0

Answer:

Step-by-step explanation: The surface area formula for a cylinder is

A=2*π*r*h+2*π*r^2

This picture gives us the radius, which is 2cm, and it gives us the height which is 8cm.

All we have to do now is just plug in the two numbers.

A= 2πrh+2πr^2

A=2π*2*8 + 2π*4

A=4π*8+8π

A=32π+8π

A=40πcm

The answer is 40π cm then!

Please give this answer the brainliest or give me a heart, if you need additional help, please contact my friend and I on Instagram.

@jessmyybest

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A boat is 60m from the base of a lighthouse. The angle of depression between the lighthouse and the boat is 37°. How tall is the

LekaFEV [45]

Answer: 34.64 m

Step-by-step explanation:

Given: A boat is 60 m from the base of a lighthouse.

The angle of depression between the lighthouse and the boat is 37°.

By using trigonometric ratios :

$\tan x=\dfrac{\text{Side opposite to }x}{\text{Side adjacent to }x}$

here x= 37°, side opposite to x = height of lighthouse (h) , side adjacent to x = 60 m

$\tan 37^{\circ}=\dfrac{h}{60}\\\\\Rightarrow\ 0.57735=\dfrac{h}{60}\\\\\Rightarrow\ h= 60\times0.57735\approx34.64$

Hence, the lighthouse is 34.64 m tall.

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3 years ago

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3 years ago

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