Question

Which best determines that a decimal is a rational number?

A. The decimal terminates and does not repeat.
B. The decimal terminates or repeats.
C. The decimal neither terminates nor repeats.
D. The decimal repeats and does not terminate.

Answer 1

B. The decimal terminates or repeats.

Explanation:

A rational number is a number that can be written as a fraction.

A repeating decimal can be written as a fraction. For example, 0.3 repeating is the same as 1/3.

A terminating decimal can also be written as a fraction. We use place value to do this.

For example, for the decimal 0.12345, we determine the place value of the last digit. In this case, 5 is in the hundred-thousandths place. This makes this number 12345/100000.

Answer 2

I may be wrong but I think the answer is B.