Asphere has a radius of 9 feet. a second sphere has a radius of 6 feet. what is the difference of the volumes of the spheres?

I’m still confused on how to work the percentages

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?

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.