Chapter 1 - Unit 1B Review: 18

$5\text{ gallons}$

Work Step by Step

Use the conversion rate $1 \text{gallon} = 4\text{ quarts}$ by multiplying $\frac{1\text{ gallon}}{4\text{ quarts}}$ to obtain: $\require{cancel} 20\text{ quarts} \\= 20\text{ quarts} \cdot \frac{1\text{ gallon}}{4\text{ quarts}} \\= \cancel{20\text{ quarts}}^5 \cdot \frac{1\text{ gallon}}{\cancel{4\text{ quarts}}} \\=5\text{ gallons}$

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