You are soldering a circular metal pendant that has a diameter of 4 inches. The gems you plan to use on the pendant are sold in bags with enough to cover 5 square inches. What is the minimum number of bags of gems you should order to complete the job?

The pendant’s radius is half its 4-inch diameter, so it is 2 inches. Its area is π × 2² ≈ 12.57 square inches. Each bag covers 5 square inches, and 12.57 ÷ 5 ≈ 2.51, so you must round up to 3 bags. The correct choice is 3.

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