Question

what is the distance between 0 and 4 on the number line? units

Explanation:

Step1: Recall distance formula

The distance $d$ between two points $a$ and $b$ on a number - line is $d = |a - b|$. Here, $a = 0$ and $b = 4$.
$d=|0 - 4|$

Step2: Calculate the absolute - value

$|0 - 4|=|-4|$. Since the absolute value of a number $x$, denoted as $|x|$, is the non - negative value of $x$, $|-4| = 4$.

Answer:

4