Question: A rain drop hitting a lake makes a circular ripple. If the radius, in inches, grows as a function of time in minutes according tor(t)=25sqrt(t+2)

A rain drop hitting a lake makes a circular ripple. If the radius, in inches, grows as a function of time in minutes according tor(t)=25sqrt(t+2) find the area of the ripple as a function of time. Find the area of the ripple att=2

Could i have a detailed explanation on how i would set this up i understand a=25sqrt(t+2) when i did my math i kept getting 2500

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