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amm1812
3 years ago
14

Suppose that the radius of a circle increases at a constant rate of 0.25 cm/sec. When the radius of this circle is 16 cm, the ar

ea of the circle increases at a rate of
Mathematics
1 answer:
irakobra [83]3 years ago
5 0

Answer:

8πcm²/sec

Step-by-step explanation:

The radius of the circle increases at a rate of dr/dt = 0.25cm/sec

The radius of the circle r = 16cm

The area of the circle increases at a rate of dA/dt = ?

Area of a circle = πr²

We take the derivative with respect to t

dA/dt = 2πrdr/dt

dA/dt = 2 π (16)(0.25)

dA/dt = 8πcm²/sec

Thank you!!!

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3 years ago
PLEASE HELP ME Check the picture and tell me whats the answer please
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Answer:

B

Step-by-step explanation:

Given

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2 years ago
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vfiekz [6]
My guess is that you're doing the Law of Cosines? You have everything you need for that except the angle theta, which is the thing you need to find.  It's set up like this: (8)^2 = (10)^2 + (5)^2 -[2(10)(5)cos A]  I used A instead of theta. Doing that math, you have: 64 = 100 + 25 -[ 100 cos A]; 64 = 125 - 100 cos A;
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5 0
3 years ago
Read 2 more answers
Which is greater 0.73 or 1.71?
KIM [24]

Answer: 1.71

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7 0
3 years ago
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mr Goodwill [35]

Answer:

B. (2, 2)

Step-by-step explanation:

The coordinate (2, 2) is the only thing they share in common, both lines intersect each other on that coordinate.

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3 years ago
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