At an aquarium, researchers are preparing a mixture of salt water. the desired ratio is 90 grams of salt per liter of water.

1 ounce= 28.35

1 gallon= 3.8

what is the ratio in ounces per gallon

Problem melissa is her dad build a walkway in their backyard. the walkway will be 54 feet long and 1.5 feet wide. the local hardware store sells tiles which are 1.5 by 1.5 feet and come in boxes of 12. how many boxes of tiles do they need?