Question 1148056
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The expression in parentheses in answer choices B, C, and D is the cost of the groceries before tax.<br>
Answer choice C show the amount of the tax -- 4% of the cost of the groceries: .04(6.8+1+2.9).<br>
The total cost of the groceries is the cost of the groceries themselves plus the tax:
1(6.8+1+2.9) + .04(6.8+1+2.9) = (1+.04)(6.8+1+2.9) = (1.04)(6.8+1+2.9), which is answer D.<br>