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Mathematics 18 Online
OpenStudy (hockey1):

The surface area of a spherical balloon is 175 cm2. If the length of the radius was six times as large, what would the surface area be? A) 1050 cm2 B) 6300 cm2 C) 8400 cm2 D) 11200 cm2

OpenStudy (saifoo.khan):

Do you know the formula for finding the surface area?

OpenStudy (hockey1):

SA = 4 π r2?

OpenStudy (saifoo.khan):

Yes. Now insert the values!

OpenStudy (saifoo.khan):

Solve for r:

OpenStudy (hockey1):

im still confused. im not sure how to do it

OpenStudy (saifoo.khan):

Since you are given the value for the total surface area. Replace the value for surface area for SA

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