Which expression can be used to find the retail price of an item that was bought at wholesale for $112 and sold at a 40% markup?

A 40% markup means adding 40% of the wholesale price to the original price. Since 40% is 0.40, the expression is $112 + 0.40($112), which is choice D. The other expressions either subtract the markup or use 4 instead of 0.40.

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