Question

question 10 of 10
what are unit conversions used for?

a. unit conversions associate a number with its units.

b. unit conversions are used to write very large numbers.

c. unit conversions express the fractional size of something.

d. unit conversions express an amount in a different unit.

Explanation:

• Option A: Associating a number with its units is about unit - quantity pairing, not conversion.
• Option B: Writing very large numbers is related to scientific notation or place - value adjustments, not unit conversion.
• Option C: Expressing fractional size is about fractions or ratios, not unit conversion.
• Option D: By definition, unit conversions take a quantity expressed in one unit and represent it in another unit (e.g., converting meters to kilometers).

Answer:

D. Unit conversions express an amount in a different unit.