A parachutist's speed during a free fall reaches 90 miles per hour. What is this speed in feet per second? At this speed, how many feet will the parachutist fall during 10 seconds of free fall?

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.