Jeremy E. answered 10/24/18
Tutor
4.9
(43)
Mathematics, Programming, Physics, Automation, and Guitar
A = Pir^2
dA = Pi*(2r)*r'
plug in values now
dA = Pi(2*20)*10
dA = 400*Pi
Lyn C.
asked 10/24/18A stone is dropped into a lake and makes circular ripples over surface of the water. If the radius of each circle is increasing 10in/s, how fast is area of circle formed ripple increasing when radius is 20in?
Jeremy E. answered 10/24/18
Mathematics, Programming, Physics, Automation, and Guitar
A = Pir^2
dA = Pi*(2r)*r'
plug in values now
dA = Pi(2*20)*10
dA = 400*Pi
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