Answer:
THE ANSWER IS D " THE COST OF MAILING 10 POUNDS OF BOOKS IS TWICE THE COST OF 5 POUNDS OF BOOKS "
D
Step-by-step explanation:
If the weight is 5 pounds, then the cost is
C = 0.75 * 5 + 3
C = 3.75 + 3
C = 6.75
If the weight is 10 pounds, then the cost is
C = 0.75 * 10 + 3
C = 7.50 + 3
C = 10.50
D is the incorrect answer.
