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anonymous
 5 years ago
How fast is the surface area of a spherical balloon increasing when the radius is 10 cm and the volume is
increasing at 15 cm3/sec? [7]
anonymous
 5 years ago
How fast is the surface area of a spherical balloon increasing when the radius is 10 cm and the volume is increasing at 15 cm3/sec? [7]

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shadowfiend
 5 years ago
Best ResponseYou've already chosen the best response.0Do you know the equation for the volume of a sphere given the radius?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0V= (4/3)[pi (r ^{3}\]

shadowfiend
 5 years ago
Best ResponseYou've already chosen the best response.0The first one is correct.

shadowfiend
 5 years ago
Best ResponseYou've already chosen the best response.0So the next step is to come up with an expression of V in terms of time, and then determine how r then changes with time. Once you come up with an expression for r in terms of time, you can plug it into the equation for surface area, and you'll be set!
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