Easy
An equation is given.
A=4πr2{A}=4 \pi r^{2}A=4πr2
Solve the equation for rrr.
r=A4πr=\sqrt{\frac{A}{4 \pi}}r=√4πA
r=A23πr=\sqrt{\frac{A}{23 \pi}}r=√23πA
r=A4r=\frac{A}{4}r=4A
r=14πr=\sqrt{\frac{1}{4 \pi}}r=√4π1
By signing up, you accept PrepHub’sterms of serviceand dataprivacy policy.