An airplane, flying at an altitude of 6.3 miles, is on a flight path that passes directly over an observer (see figure). Let 0 be the angle of elevation from the observer to the plane. Find the distance d from the observer to the plane For each value of 0. (Round your answers to one decimal place.) 6.3 mi Not drawn to scale (a) 0 = 30 mi (b) 0 = 90 mi (c) 0 = 120 mi