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Saira is using the formula for the area of a circle to determine the value of .

Saira is using the formula for the area of a circle to determine the value of .-example-1

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For this problem, we just have to use the values we're given to calculate the approximate value of pi.

The formula presented is


\pi=Ar^(-2)

When you have a negative exponent, we can use the following property


a^(-b)=(1)/(a^b)

Using this property, our problem turns out to be


\pi=(A)/(r^2)

Now, we just need to plug the given values on this equation


\pi=(50.265)/(4^2)=3.1415625\approx3.142

The approximated value for pi is 3.142.

User Wayne Fulcher
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