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Area of a circle round to the nearest hundrendth

Mathematics
Tutor: None Selected Time limit: 0 Hours

4. circumference= 31.4

radius= do not know

area= do not know

Can anyone help me solve how to do this

Apr 14th, 2015

circumference = (pi)(d)

31.4 =  (pi)(d)

9.9949 = d

The radius is half of the diameter which is 4.9975

Area = (pi)(r)^2

A = (pi)(4.9975)^2

A = 78.4612

Apr 14th, 2015

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Apr 14th, 2015
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Apr 14th, 2015
Dec 8th, 2016
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