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| Math Central | Quandaries & Queries |
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Question from tina, a student: the surface area of a sphere is about 86 ft (2) find the surface area of a larger sphere that has a scale factor of 4 |
Tina,
The surface area of a sphere of radius r feet is 4 π r2 square feet. Thus if your sphere satisfies
4 π r2 = 86 square feet.
What is r? If the scale factor is 4 what is the new radius? What is the new surface area?
Penny
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