The directions on the bottle mentioned in Exercise 1 also specify that, for extra-strength...
The directions on the bottle mentioned in Exercise 1 also specify that, for extra-strength cleaning, 
cup of cleaner should be used for the gallon of water. For extra-strength cleaning, how much cleaner should be mixed with 
gal of water?
Exercise 1
According to the directions on a bottle of Armstrong® Concentrated Floor Cleaner, for routine cleaning, 
cup of cleaner should be mixed with 1 gal of warm water. How much cleaner should be mixed with 
gal of water?
EXAMPLE Applying Proportions
After Lee Ann Spahr had pumped 5.0 gal of gasoline, the display showing the price read $16.60. When she finished pumping the gasoline, the price display read $48.14. How many gallons did she pump?
To solve this problem, set up a proportion, with prices in the numerators and gallons in the denominators. Let x = the number of gallons she pumped.
She pumped 14.5 gal. Check this answer. (Using a calculator reduces the possibility of error.) Notice that the way the proportion was set up uses the fact that the unit price is the same, no matter how many gallons are purchased.
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