Help ME PLS

18.84 all you do is the v times 3.14 and that’s what you get

3,14•3^2= 28,26
28,26•5=141,3 m^2

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.

What's the denominator