Final answer:
The question pertains to unit conversion between inches and centimeters, which is a key skill in mathematics. The standard conversion factor is 1 inch is equal to 2.54 centimeters, and this factor is used for converting measurements between these two units.
Step-by-step explanation:
The student is inquiring about unit conversion between inches and centimeters, which is a common topic in mathematics, particularly in measurement and dimensional analysis. Understanding how to convert between different units of measurement is fundamental for solving various mathematical and real-life problems. The given unit rate states that there are 0.39 inches per centimeter. However, the standard conversion factor is that 1 inch is equal to 2.54 centimeters.
To convert centimeters to inches, divide the number of centimeters by the conversion factor, which is 2.54. For instance, to convert 5 centimeters into inches, you divide 5 by 2.54, resulting in approximately 1.97 inches.
If the task were to convert inches to centimeters, you would multiply the number of inches by the conversion factor. For example, converting 5 inches into centimeters would involve multiplying 5 by 2.54 to get 12.7 centimeters.