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OpenStudy (anonymous):
What is the surface area of a sphere with radius of 3.5? A. 12.25p B. 14p C. 24.5p D. 49p
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jimthompson5910 (jim_thompson5910):
use the formula SA = 4*pi*r^2 where SA = surface area r = radius
OpenStudy (anonymous):
i did and got 153.86
jimthompson5910 (jim_thompson5910):
leave pi as it is
OpenStudy (anonymous):
A spherical water tank has a diameter of 10 feet. How much water does it hold when half full? (Use 3.14 for p)
jimthompson5910 (jim_thompson5910):
find the volume of the full tank using V = (4/3)*pi*r^3 then cut that volume in half (since we want to know how much water there is when it's half full)
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