math
posted by scott .
use n equals 22 over 7 find the area of a circle with a radius of 7

that 'n' is actually the Greek letter π which is equal to 3.1416... but since in the problem π = 22/7 , we use this value.
recall that the area of a circle is given by
A = π*r^2
where
r = radius
substituting,
A = π*(7^2)
A = (22/7)(49)
A = 22*7
A = 154 square units
hope this helps~ :)