Rocco stores his coins in piles of 10 coins each. He has 4 piles of quarters, 6 piles of dimes, 9 piles of nickels, and 5 piles of pennies. How much money does Rocco have?
Thoughts? Step-by-step reasoning:
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Each pile has 10 coins, so he has:. 10 * 4 * $.25 = $10.00 worth of quarters,. 10 * 6 * $.10 = $6.00 worth of dimes,. 10 * 9 * $.05 = $4.50 worth of nickels, and. 10 * 5 * $.01 = $0.50 worth of pennies. Altogether he has $10.00 + $6.00 + $4.50 + $0.50 = $21.00.
Thus, the answer is 21.
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