Jonas wants to determine the enlarged dimensions of a photo to be framed. The original photo is 4 in. wide by 6 in. long. The new photo will be 10 in. wide. What will the new length be?

The photo’s length and width must be enlarged by the same scale factor to keep its shape. The width increases from 4 inches to 10 inches, so the scale factor is 10 ÷ 4 = 2.5. Multiply the original length by 2.5: 6 × 2.5 = 15 inches. The new length is 15 inches, choice C.

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