Help Find the Avrage rate of change of the distance in miles per hour

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank

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

Set up and solve a proportion for the following application problem. if 55 pounds of grass seed cover 404 square feet, how many pounds are needed for 7272 square feet?