Question

Is 5.78778777 a rational or irrational number?..

Answer 1

The number 5.78778777 is a rational number.

Step-by-step explanation:

A rational number is a number that can be expressed as a fraction, where both the numerator and the denominator are integers. An irrational number, on the other hand, cannot be expressed as a fraction and has an infinite number of non-repeating decimal places.

In the case of 5.78778777, it is a rational number. This is because it can be expressed as the fraction 578778777/100000000, where both the numerator and the denominator are integers.

Answer 2

That number is the ratio of 578,778,777 to 100,000,000 , so it's rational.

Here's a surprising factoid:

ANY number that you can completely write down on paper with digits...
and a decimal point or a fraction bar if you need them ... is rational.

If you can write it down ... without saying "repeating" or using symbols ...
it's rational.