Acircle has an area of 256pi. what is the diameter of the circle?

Circle Area = PI*r^2
Circle Area = PI * 256
radius = sq root(256)
radius = 16
diameter = 32

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.