Im almost done with my math homework pls help

The circumference of a redwood tree trunk is 20π ft, and it is 100 ft tall. what is the approximate volume of the redwood tree trunk? 1,000π ft3 10,000π ft3 4,000π ft3 40,000π ft3

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

Write an equation of the line that passes through 9,2 and is parallel to the line y=5/3x+9