How do you do this question?

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64

The circle below is centered at the point (3, 1) and has a radius of length 2. what is the equation?

The stairs leading from the ground to the entrance of a plane forms a right triangle with the ground. if the distance of the stairs measures 22 feet and the ground distance measures 11 feet, how high is the entrance to the plane from the ground? which diagram represents this scenario? / 22ft © 22ft 11 ft 11 ft 22 it