A worm pokes it's head out of the ground and spies a robin that is sitting
15 feet up on a tree branch. If the angle of elevation from the worm to the
bird is 77º, how far is the bird from the worm to the nearest tenth of a foot?

A-66.7 feet
B-3.5 feet
C-14.6 feet
D-15.4 feet

M? aoc=96 ? space, m, angle, a, o, c, equals, 96, degree \qquad m \angle boc = 8x - 67^\circm? boc=8x? 67 ? space, m, angle, b, o, c, equals, 8, x, minus, 67, degree \qquad m \angle aob = 9x - 75^\circm? aob=9x? 75 ? space, m, angle, a, o, b, equals, 9, x, minus, 75, degree find m\angle bocm? bocm, angle, b, o, c: