To determine which aluminum foil option is the better buy, we can calculate the cost per square inch for each roll.
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5-yard roll:
- 1 yard = 36 inches, so 5 yards = 5 × 36 = 180 inches.
- The width of standard aluminum foil is generally 12 inches.
- Area = Length × Width = 180 inches × 12 inches = 2160 square inches.
- Cost = $7.20.
- Cost per square inch = \( \frac{7.20}{2160} \approx 0.00333 \) dollars per square inch.
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95-inch roll:
- Area = Length × Width = 95 inches × 12 inches = 1140 square inches.
- Cost = $5.70.
- Cost per square inch = \( \frac{5.70}{1140} \approx 0.00500 \) dollars per square inch.
Comparing the two:
- The 5-yard roll costs approximately $0.00333 per square inch.
- The 95-inch roll costs approximately $0.00500 per square inch.
Conclusion: The 5-yard roll of aluminum foil for $7.20 is the better buy, as it has a lower cost per square inch.