Question 45767
A circle is shrinking in size, and the radius is given by the function r(t) = 1/(2 + t^2), where t is the time in minutes. Express the area of the circle as a function of t, and find its value when t=4 min. 
After I solve the above function, do I then have to find the area by solving area=pie(r^2)? 

You don't have to solve the function; it is already solved for "r".
Just put the r value into the formula A=(pi)r^2

Cheers,
Stan H.