What is the size of a 5-inch smartphone display in centimeters?

To convert a size from inches to centimeters, you need to use the conversion factor that 1 inch is equal to 2.54 centimeters. Therefore, to find the size of a 5-inch display in centimeters, you would multiply 5 inches by 2.54 cm/inch.

5 inches x 2.54 cm/inch = 12.7 cm.

This calculation shows that the correct answer is 12.7 cm, which corresponds to the size of a 5-inch smartphone display in metric units. Understanding this conversion is crucial not only for measurements in mathematics but also for practical applications in technology, design, and everyday measurements. The other options represent values that would arise from incorrect conversions or miscalculations based on rounding or misinterpreting unit conversions.