Mathematics

Eugene Macdonald

29 April, 03:02

Christine is building a deck in her backyard. In order to place the

posts, she will make concrete using a mixture. The mix requires 1 part

water to 2 parts cement to 3 parts sand. The relationship between

water, cement, and sand is proportional. If she has 25 pounds of

cement and will use it all, how many pounds of sand will she need?

One gallon of water weighs about 8.34 pounds. How many gallons of

water will she need? Round to the nearest tenth.