SOLUTION: what is the surface area of a sphere with a diameter of 18 centimeters? express the answer in square meters. Round to the nearest hundreth.

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Question 451294: what is the surface area of a sphere with a diameter of 18 centimeters? express the answer in square meters. Round to the nearest hundreth.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
If the diameter is 18 cm, then the radius is r=18%2F2=9 cm.


S=4pi%2Ar%5E2 Start with the surface area of a sphere formula.


S=4pi%2A%289%29%5E2 Plug in r=9.


S=4%283.14159265%29%289%29%5E2 Replace pi with 3.14159265 (note: Use more digits of pi to get better accuracy).


S=4%283.14159265%29%2881%29 Square 9 to get 81.


S=4%28254.46900465%29 Multiply 3.14159265 and 81 to get 254.46900465.


S=1017.8760186 Multiply 4 and 254.46900465 to get 1017.8760186.


S=1017.88 Round to the nearest hundredth.


So the surface area of a sphere with a diameter of 18 cm is approximately 1017.88 square cm.


I'll let you do the conversion to square meters.