Three boxes are stacked one on top of the other. One box is 3 feet 2 inches tall, one is 2 feet 3 inches tall, and one is 6 feet 9 inches tall. How high is the stack? Write your answer in feet and inches. Use a number less than 12 for inches.

13'1"

Step-by-step explanation:

6'9"+3'2"=9'11"

9'11"+3'2"=12'13"

12'13"=13'1"

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

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