How much pure acid should be mixed with 6 gallons of a 60% acid solution in order to get an 80% acid solution?

What is 6.5 percent of $40

Nick bought a multi-room air conditioner at a sale price of $340. The original price of the air conditioner was $400. Give your answer as a percentage.

Stephen belong to a movie club in which he pays an annual fee of $39.95 and then rents DVDs for $0.99 each. In one year, Stephen spent $55.79. Write and solve an equation to find how many DVDs did he rented.

A swimming pool in the shape of a rectangle is surrounded by 3 feet of walkway. the pool is 23 feet wide and 32 feet long. how long would the fence be that just encloses the walkway and the pool?

Kyra and her twin sister share shoes. In there closet they have four pairs of Sandals, five pairs of tennis shoes, and three pairs of boots.

Find the quotient. 715 / 9 =

1. a model rocket is fired vertically into the air at 320 ft/s. The expression - 16t^2+320t gives the rocket's height after t seconds. factor this expression Factor each expression or state if it cannot be factored. 1. 13q^4+2p^2 2. 14n^3+7n+7n^2 3.

Yolanda's club requires that 60% of the members be present for any vote. If at least 30 members must be present to have a vote, how many members does the club currently have?

Give an example of a positive temperature and a negative temperature that have a difference of 5°F.

5506 divided by 57 with remainder