find, to the nearest degree, the angle of elevation when the sun when a person 170 cm tall casts a shadow 170 cm long

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Candy lives in the center of town. her friend darlene lives 28 miles to the east and her friend dana lives 21 miles north. approximately how far do dana and darline live apart ?