1. [-/3 Points] DETAILS LARCALCET7 3.7.042. MY NOTES ASK YOUR TEACHER An airplane flies at an altitude of y = 10 miles toward a point directly over an observer (see figure). The speed of the plane is 600 miles per hour. Find the rates (in radians per hour) at which the angle of elevation 0 is changing when the angle is 0 = 450, 0 = 60, and 0 = 70. y mi Not drawn to scale (a) 8 = 450 rad/hr (b) 8 = 60 rad/hr (c) 0 = 70 (Round your answer to two decimal places.) rad/hr