A′ is the image of A in a regular pentagon. What is the angle of a clockwise rotation, in degrees, about the origin, that transforms A to A′

Technicians have installed a center pivot, circular irrigator for a farm that covers 25 acres. a.) how long is the irrigation boom (in feet) from the center pivot to its farthest extent? b.) if the irrigation boom makes 4 full revolutions in a day, how many miles does the end of the boom travel in 5 days?