since she already has 18 cups flour she needs 6 cups of sugar
10P4 = 10! / (10-4)! = 10*9*8*7 = 5040
9C4 = 9! / 5! 4! = 9*8*7*6 / 4*3*2*1 = 126
This answer can be stated in many ways. Each friend will get 3/5, 0.6, or 60% of a pack. (All the answers I previously stated are equal)
The answer is b. 9pi because 3^2xpi=9pi.
