Solving Applications of Proportions

EXAMPLE 6.45

When pediatricians prescribe acetaminophen to children, they prescribe $$5$$ milliliters (ml) of acetaminophen for every $$25$$ pounds of the child's weight. If Zoe weighs $$80$$ pounds, how many milliliters of acetaminophen will her doctor prescribe?

EXAMPLE 6.46

One brand of microwave popcorn has $$120$$ calories per serving. A whole bag of this popcorn has \(3.5\) servings. How many calories are in a whole bag of this microwave popcorn?

EXAMPLE 6.47

Josiah went to Mexico for spring break and changed \(\$325\) dollars into Mexican pesos. At that time, the exchange rate had \(\$1\) U.S. is equal to \(12.54\) Mexican pesos. How many Mexican pesos did he get for his trip?