Taylor is considering engine oil A. It would save 60 cents for every 20 miles on a 600 mile trip. Oil A costs $35, and there is a $10 coupon. Is it worthwhile to buy the oil?

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Multiple Choice

Taylor is considering engine oil A. It would save 60 cents for every 20 miles on a 600 mile trip. Oil A costs $35, and there is a $10 coupon. Is it worthwhile to buy the oil?

Explanation:
To decide if buying the oil is worthwhile, compare the total savings on the trip to the net cost of the oil after the coupon. The 600-mile trip yields 60 cents saved every 20 miles, which is 30 segments, so total savings = 30 × $0.60 = $18. The oil costs $35 but with the $10 coupon the cost drops to $25. Since you’d spend $25 to gain only $18, you’d lose $7 overall. So it’s not worthwhile to buy the oil on this trip.

To decide if buying the oil is worthwhile, compare the total savings on the trip to the net cost of the oil after the coupon. The 600-mile trip yields 60 cents saved every 20 miles, which is 30 segments, so total savings = 30 × $0.60 = $18. The oil costs $35 but with the $10 coupon the cost drops to $25. Since you’d spend $25 to gain only $18, you’d lose $7 overall. So it’s not worthwhile to buy the oil on this trip.

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