In 2012, five U. S. Postal stamps cost $2.20. How much did seven stamps cost? (Hint, find the unit rate first) $

An air conditioning system can circulate 350 cubic feet of air per minute. how many cubic yards of air can it circulate per minute?

Which of the following are accepted without proof in a logical system? check all that apply.

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?