3 years ago

If the image above is rotated about the y-axis, which of the following images best represents the result?

1 answer:

swat323 years ago

6 0

Answer:

the answer would be x because it has a larger width than y

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katovenus [111]

Answer:

0.67 cm/s

Step-by-step explanation:

The area of a square is given by :

$A=x^2$ ....(1)

Where

x is the side of a square

$\dfrac{dA}{dt}=12\ cm^2/s$

Differentiating equation (1) wrt t.

$\dfrac{dA}{dt}=2x\times \dfrac{dx}{dt}$

When A = 81cm², the side of the square, x = 9 cm

Put all the values,

$12=2\times 9\times \dfrac{dx}{dt}\\\\\dfrac{dx}{dt}=\dfrac{2}{3}\\\\\dfrac{dx}{dt}=0.67\ cm/s$

So, the length of the side of a square is changing at the rate of 0.67 cm/s.

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Step-by-step explanation:

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Akimi4 [234]

Answer: True

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Reptile [31]

just multiply 45 time 31!

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anygoal [31]

Answer:Step-by-step explanation:

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