the spread of oil leaking from a tanker is in the shape of a circle. If the radius r (in feet) of the spread after t hours is r(t)= 200 square root of t, find the area A of the oil slick as a function of the time t.
You know that the area of a circle is A=pi*r^2. You're told that the radius is a funtion of time and
r(t)=200*sqrt(t). If you compose the function to get
A(r(t))=pi*(200*sqrt(t))^2
you'll have area as a funtion of time, or
A(t) = something you can simplify.
1 answer
pi*(200^2)^2