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OpenStudy (anonymous):
A spherical balloon is being inflated. Find the instantaneous rate of change of the surface area S of the balloon with respect to the radius r at a. any value of r b. r = 3ft
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OpenStudy (amistre64):
well its a good thing the forumla for the Sa just has r in it
OpenStudy (amistre64):
i integrated lol
OpenStudy (amistre64):
Sa' = 8pi r
OpenStudy (anonymous):
Are you kidding me? I didn't think it was possible that it would be that easy...hence asking the question. Thanks man! By the way, you are SURE it's that simple? Like 100% sure?
OpenStudy (amistre64):
yep, as long as i can recall which way to go :)
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OpenStudy (amistre64):
rate of change is the derivative
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