Answer:
Step-by-step explanation:
The first thing you have to do, is rewrite the given expression
[tex]Ar^{-2} = \frac{A}{r^{2} }[/tex]
Then you plug in the given values
[tex]\frac{A}{r^{2} } = \frac{50.265}{4^{2} }[/tex]
Finally you simplify
[tex]\frac{50.265}{4^{2} }=\frac{50.265}{16} = 3.142[/tex]
