C=2rπ for r relates the circumference Cof a circle to its radius r. (Recall that is the constant ratio of circumference to diameter.) a. Solve C= 2 r for r. b. If a circle's circumference is 15 inches, what is its radius? Leave the symbol in your answer.

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex

Amachine part consists of a half sphere and a cylinder, as shown in the figure. the total volume of the part is π cubic inches.