Need help with the answer please and thank you

What is the lcm of 16 and 40 ? 24 and 40 ?

The art class is planning to paint a mural on an outside wall. this figure is a scale drawing of the wall. width: 11 in length: 28 in unit rate: 1.5 ft per in. write the ratio of the area of the drawing to the area of the actual mural. write your answer as a unit rate. show that this unit rate is equal to the square of the unit rate 1.5 ft per in

Astraight water slide is 175 feet above ground and is 200 feet long. what is the angle of depression to the bottom of the slide?