Atree on a hillside casts a shadow 215 ft down the hill. if the angle of inclination of the hillside is to the horizontal and the angle of elevation of the sun is find the height of the tree.

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up