(solution) 1. A spherical ball of dry ice is evaporating at a rate

(solution) 1. A spherical ball of dry ice is evaporating at a rate

1. A spherical ball of dry ice is evaporating at a rate proportional to its surface area. Its volume decreases from 100 cubic centimeters at 5pm to 80 cubic centimeters at 6pm.(a) Find the volume as a function of time.(b) When will the ball of dry ice be completely evaporated?

This problem is completely optional. Remember to focus on studying for the exam ?rst and
then this extra credit. This due on the day of the exam and will not be accepted late. Each
part is worth 2 points. 1. A spherical ball of dry ice is evaporating at a rate proportional to its surface area. It?s volume
decreases from 100 cubic centimeters at 5pm to 80 cubic centimeters at 6pm.
(a) Find the volume as a function of time.
(b) When will the ball of dry ice be completely evaporated?