Question

Each side of a square is increasing at a rate of 2 cm/s. At what rate is the area of the square increasing when the area of the square is 9 cm^2?

Answer 1

\[A=s^2\]
\[A'=2ss'\]
you are told \(s'=2\) and \(A=9\)

Answer 2

if \(A=9\) then \(s=3\) plug them in and solve for \(A'\)