Three boxes are stacked one on top of the other. one box is
3
feet
10
inches tall, one is
4
feet
7
inches tall, and one is
3
feet
9
inches tall. how high is the stack?

The cross-sectional areas of a right triangular prism and a right cylinder are congruent. the right triangular prism has a height of 6 units, and the right cylinder has a height of 6 units. which conclusion can be made from the given information? the volume of the triangular prism is half the volume of the cylinder. the volume of the triangular prism is twice the volume of the cylinder. the volume of the triangular prism is equal to the volume of the cylinder. the volume of the triangular prism is not equal to the volume of the cylinder.

Dawn is selling her mp3 player for 3 4 of the original price. the original price for the mp3 player was $40. how much is she selling her mp3 player for?

What is the perimeter of an equilateral triangle if each side is (x+3)?