4 years ago

Please help ?????? ???

Mathematics

1 answer:

sasho [114]4 years ago

3 0

Answer:

Step-by-step explanation:

the side lengths have to be equal because they are the same angle and got down the exact same length

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The radius of a right circular cylinder is increasing at a rate of 9 inches per minute and the height is decreasing at a rate of

pav-90 [236]

Answer:

$\frac{dA}{dt}=1840.97 in^{2}/min$

Step-by-step explanation:

The equation of the surface of the right circular cylinder is:

$A=2\pi rh+2\pi r^{2}=2\pi(rh+r^{2})$

Now, the rate change of this area will be:

Using the change rule

$\frac{dA}{dt}=\frac{\partial A}{\partial r}\frac{\partial r}{\partial t}+\frac{\partial A}{\partial h}\frac{\partial h}{\partial t}$

Where:

$\frac{\partial h}{\partial t}$ is the rate change of height (-16 in/min)
$\frac{\partial r}{\partial t}$ is the rate change of radius (9 in/min)

$\frac{dA}{dt}=\frac{\partial A}{\partial r}9+\frac{\partial A}{\partial h}(-16)$

$\frac{dA}{dt}=2\pi(h+2r)9-2\pi r16=2\pi((h+2r)9-16r)$

Now, r = 16 and h = 29

$\frac{dA}{dt}=2\pi((29+2*16)9-16*16)$

$\frac{dA}{dt}=1840.97 in^{2}/min$

I hope it helps you!

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4 years ago

MATH 20 POINTS:DD HELP PLZ QUIK

Airida [17]

Answer:

D (3)

Step-by-step explanation:

100 is 3 off from 103

104 is 1 off from 103

107 is 4 off from 103

3+3+3+1+4+4=18

18/6 = 3

(there are six total values)

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3 years ago

A group of 5 children and 7 adults are going to a movie. child tickets costs $5 and adult tickets cost $7. how much will the mov

zlopas [31]

= (5*5)+(7*7)
= 25 + 49
= 74

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4 years ago

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What is the difference of 54.59 and 26.61?

Vilka [71]

54.59 - 26.61 is 27.98. Hope it helps! :) If you could vote my answer as the brainliest, that would be awesome! :)

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3 years ago

What is the perimeter?

Schach [20]

Answer:

Step-by-step explanation:

add up each side

14 + 14 = 28

28 + 6 = 34

34 + 9 = 43

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3 years ago