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Mathematics 20 Online
OpenStudy (anonymous):

An expanding sphere has a radius r = 0.4t cm at time t (in seconds). Let V be the sphere's volume. Find dV/dt when (a) r=3 and (b) t=3 What is a

OpenStudy (anonymous):

r=.4t ? are you giving dr/dt ?

OpenStudy (anonymous):

No that's just how the book words it I think.

OpenStudy (anonymous):

dr/dt = .4

OpenStudy (anonymous):

That's what I got. but here are my choices 1.6π 3.2π 9π 9.1π 14.4π 21.1π

OpenStudy (anonymous):

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