a ladder 20 feet long leans against a building, forming an angle of 71° with the level ground. To the nearest foot, how high up the wall of the building does the ladder touch the building?

Answer:18.91

Step-by-step explanation:

when you write it out, 20 end up being on the hypotenuse and x (how tall the building is) is opposite from the angle, so you would do sin or as my teacher taught us how to reconise it S o/h SOH (sin opposite over hypotenuse) so you would write sin (71) = X/20 and cross multipy so you would multiply 20 X sin (71) = 18.91