Final answer:
The measure of the least positive angle that is coterminal with -3pi/5 radians is 7pi/5 radians.
Step-by-step explanation:
To find the measure of the least positive angle that is coterminal with -3pi/5 radians, we need to add or subtract 2pi radians until we get a positive angle. Starting with -3pi/5, we can add 2pi to get a positive angle:
-3pi/5 + 2pi = 7pi/5
So, the measure of the least positive angle that is coterminal with -3pi/5 radians is 7pi/5 radians.