Find the exact length of the third side.

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Zoey made 5 1/2 cups of trail mix for a camping trip. she wants to divide the trail mix into 3/4 cup servings. a. ten people are going on the trip. can zoey make enough 3/4 cup servings so that each person gets one serving? b. what size would the servings need to be for everyone to have a serving?