Answer: 21 quarts
Step-by-step explanation: In this problem, we are asked to convert 5.25 gallons into quarts. To convert gallons into quarts, we use the conversion factor for gallons and quarts.
Conversion factor ⇒ 4 quarts = 1 gallon
Next, notice that we are going from a larger unit "gallons" to a smaller unit "quarts" and when we go from a larger unit to a smaller unit we multiply.
We will multiply 5.25 by the conversion factor which is 4 to get 21 quarts.
Therefore, 5.25 gallons is equal to 21 quarts.
