Which of the following is a rational number?(1 point)

7–√
square root of 7

7.8
7.8

7.9837377283...
7.9837377283...

π
pi

1 answer

To determine which of the following numbers is a rational number, let's review each option:

  1. \( 7 - \sqrt{7} \): This number is irrational because it involves the square root of 7, which is irrational.

  2. \( 7.8 \): This number is a rational number because it can be expressed as the fraction \( \frac{78}{10} \).

  3. \( 7.9837377283... \): This number appears to be a non-repeating decimal, therefore it is also irrational.

  4. \( \pi \): This is a well-known irrational number.

Based on the options, the rational number is 7.8.