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klio [65]
3 years ago
8

Solve for Surface Area and Volume.Show work and supporting evidence, please. Hurry, please!​

Mathematics
2 answers:
OverLord2011 [107]3 years ago
8 0

Answer:

Step-by-step explanation:

<em>Surface area</em>:  <em>A =</em> 4πr².  If r = 9 in, then the surface area is

4(3.14)(9 in)² = 1018 in²

<em>Volume</em>:  (4/3)πr³.  Here, V = (4/3)(3.14)(9 in)³ = 3052 in³

UkoKoshka [18]3 years ago
5 0

Answer:

Volume-- 3053.6

Surface Area- 1017.88

Step-by-step explanation:

A=4πr2=4·π·92≈1017.87602

V=4

3πr3=4

3·π·93≈3053.62806

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Hyun Woo is riding a ferris wheel. H t H(t) models his height (in m m) above the ground, t t seconds after the ride starts. Here
worty [1.4K]

Answer:

<u></u>

  • <u>53 seconds.</u>

Explanation:

The text and the model are garbled.

This is the question amended:

<em />

<em>Hyun Woo is riding a ferris wheel. H(t) models his height (in m) above the ground, t seconds after the ride starts. Here, t is entered in radians.</em>

<em>H(t) = -10 cos(2π/150 t)+10</em>

<em />

<em>When does Hyun Woo first reach a height of 16 m?</em>

<em />

<h2>Solution</h2>

<em />

When <em>Hyun Woo reaches a height of 16 m</em> the <em>model </em>states:

  • <em>16 = -10 cos(2π/150 t)+10</em>

<em />

Then you must find the lowest positive value of t that is a solution of the equation.

Solve the equation:

  • <em>16 = -10 cos(2π/150 t)+10</em>

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  • 2π/150t = arccos(-0.6)

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4 0
3 years ago
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