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?