Problem 28
Write each ratio as a unit ratio and interpret the result. A family pays \(\$ 550\) in rent and has a gross monthly income of \(\$ 2240 .\) What is the rent-to-income ratio?
Problem 29
Write each ratio as a unit ratio and interpret the result. At a certain college campus, there are \(12,480\) students and 740 faculty. What is the student-to-faculty ratio?
Problem 29
Convert using dimensional analysis. 0.4 gallon to ounces
Problem 31
Solve. William drove 358.4 miles using 16.4 gallons of gasoline. At this rate, how much gasoline would he use to drive 750 miles?
Problem 31
For Exercises, convert. 3600 kilograms to metric tons
Problem 32
Solve. A carpet cleaning company claims that it will clean 400 square feet for 54.95 dollars. At this rate, how much should it charge to clean 600 square feet?
Problem 34
Solve. A 20 -pound bag of fertilizer covers 5000 square feet. How many pounds of fertilizer should be used for a lawn that is \(12,000\) square feet? If the fertilizer comes only in 20 -pound bags, how many bags must be purchased?
Problem 36
Convert using dimensional analysis. 124 ounces to pounds
Problem 36
Solve. In taking a patient's pulse, a nurse counts 19 heartbeats in 15 seconds. How many heartbeats is this in 1 minute? (1 minute \(=60\) seconds)
Problem 37
Solve. Gina paid \(\$ 5.92\) for \(\frac{3}{4}\) pound of shrimp. What was the unit price in dollars per pound?