Concept explainers
*After you solve part (b) of this problem, think carefully about your explanation in part (a). You may find that you need to revise it.
a. What is the smallest number of coins you can use to make 43 cents if quarters, dimes, nickels, and pennies are available? Explain why your answer is correct.
b. What is the smallest number of coins you can use to make 43 cents if quarters, dimes, and pennies (but no nickels) are available? Explain why your answer is correct.
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