A gallon of gas costs $3.80. How many gallons can be purchased with $19?

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Multiple Choice

A gallon of gas costs $3.80. How many gallons can be purchased with $19?

Explanation:
This question tests how to use unit price to determine how many items you can buy with a fixed amount of money. To find how many gallons you can buy, divide the total money by the price per gallon. Here, 19 dollars divided by 3.80 dollars per gallon equals 5, since 5 × 3.80 = 19.00 exactly. So you can purchase five gallons with $19. A quick check is to multiply the price per gallon by the number of gallons and see if it equals the available money, which it does in this case.

This question tests how to use unit price to determine how many items you can buy with a fixed amount of money. To find how many gallons you can buy, divide the total money by the price per gallon. Here, 19 dollars divided by 3.80 dollars per gallon equals 5, since 5 × 3.80 = 19.00 exactly. So you can purchase five gallons with $19. A quick check is to multiply the price per gallon by the number of gallons and see if it equals the available money, which it does in this case.

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