Using a number line, what whole number and rational number to the nearest half is 20−−√

Question

between?

Answer 1

The whole number that is closest to 20−−√ is 4.

To determine the rational number that is closest to 20−−√, we can use a number line.

We start by plotting the whole numbers 0, 1, 2, 3, and so on, until we reach a number greater than 20−−√.

The square root of 20 is approximately 4.47, which means 20−−√ is slightly less than 4.5.

Therefore, the rational number to the nearest half that is closest to 20−−√ is 4.5.

So, the whole number and rational number to the nearest half between 20−−√ are 4 and 4.5, respectively.