Answer:
3 3/4 teaspoons
Explanation:
Pedro mixes 3/4 teaspoon of plant food into each gallon of water. How many teaspoons of plant food should Pedro mix into 5 gallons of water? To answer this, multiply "3/4 teaspoon per gallon" by 5 gallons:
3 teaspoons
------------------- * 5 gallons = 15/4 teaspoons, or 3 3/4 teaspoons.
4 gallons