What is the average rate of change in minutes per year of time a person spends sleeping each night from age 20 to age 80?

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.

In terms of x, find an expression that represents the area of the shaded region. the outer square has side lengths of (x+5) and the inner square has side lengths of (x-2), as shown. area: a1 x + a2 square units submit

The base of a solid right pyramid is a square with an edge length of n units. the height of the pyramid is n - 1 units. sia (n-1 n