A plumber uses the expression 48 plus 25 h to determine the number of dollars to charge each customer. If h is equal to 4 , how much does the customer pay?

Substitute 4 for h in the expression: 48 + 25 × 4. Multiply first: 25 × 4 = 100, then add 48 to get 148. The customer pays 148 dollars, choice D.

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