Answer: 0.12579835781
Step-by-step explanation: Notice that the decimal in this problem does not terminate. Therefore, in order to decide whether it's rational or irrational, we need to determine whether the decimal is a repeating decimal.
Since there seems to be no pattern fore the digits in this decimal, we say that the decimal is non-repeating.
When a decimal is both non-repeating and non-terminating, it's classified as an irrational number.