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Answer :
Final answer:
The estimated cost of Jack's purchases is $18, while the exact cost is $20.04. After paying, his change from $50 should be $29.96.
Explanation:
To estimate the total cost of the items, we'd round them off the prices. The drill bits at about $1 each, the washers at about $0 each and the hammers at about $5 each. Multiplying these by the quantities gives us $8 for drill bits, $0 for washers and $10 for hammers, which adds up to an estimated cost of $18.
To calculate the exact cost, we multiply the actual prices by the quantities, which equals $9.76 for eight drill bits, $1.10 for ten washers and $9.18 for two hammers. Adding these up, the exact cost is $20.04.
Finally, to determine his change from $50, we subtract the total cost from the money he had. That's $50.00 - $20.04 = $29.96.
Learn more about multiplication and subtraction
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