A painting is purchased as an investment for $125. If its value increases continuously so that it doubles every 3 years, then its value is given by the function V(t)=125?2^t/3 for t>=0 where t is the number of years since the painting was purchased, and V(t) is its value (in dollars) at time t. Find V(12) and V(15). V(12)= V(15)