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?

Well the formula to find the volume of a sphere is 3/4(pi)r^3
sphere with the radius of 9: 3/4(pi)9^3 = 3053.63
sphere with the radius of 6: 3/4(pi)6^3 = 904.78
the difference: 2148.85

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.