Pretone anti-freeze has 18% alcohol in it. Pleak anti-freeze has 10% alcohol in it. How many liters of each should be mixed to get 20 liters of a mixture that is 15% alcohol?

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

Saline iv fluid bags cost $64.20 for 24, 1000 ml bags from one supplier. a new supplier sells 500 ml bags for $2 each. the hospital uses about 10,000, 1000 ml bags each month. nurses report that about half of the bags are more than half full when they are discarded. if you are going to use only one supplier, which size bag provides the best deal, and how much will you save each month? compare the cost of the new supplier to the current one.

At 6 1/2 cents per pound of string beans how much does 7 pounds cost