Math
posted by Rosie .
2 part question
1) a cone shaped paper cup has a height of 7 inches and a diameter of 5 inches. What is the volume of the cone? Round answer to the nearest hundredth.
2) if we collect rainwater in the cup in question 1 until the waters depth is 6 inches, what percentage of the space inside the cup (volume) is still empty? Round answer to the nearest hundreth

1. V = pi*r^2*h/3.
V = 3.14(2.5)^2*7/3 = 45.81 In^3.
2. V = 3.14*(2.5)^2*1/3 = 6.54 In^3 empty.
%Empty = (6.54/45.81) + 100% = 14.28.