ANSWER :
The square root of 20
is appromately 4.5 .
STEP BY STEP EXPLANATION :
[tex]\mathsf{\sqrt{N}\approx\dfrac{N+B}{2\sqrt{B}}} \\\\\\ \mathsf{\sqrt{20}\approx\dfrac{20+16}{2\sqrt{16}}} \\\\\\ \mathsf{\sqrt{20}\approx\dfrac{36}{2\times4}} \\\\\\ \mathsf{\sqrt{20}\approx\dfrac{36}{8}} \\\\\\ \boxed{\mathsf{\sqrt{20}\approx\ 4.5}}[/tex]
Therefore , the square root of 20 is appromately 4.5 .
#BrainlySummerChallenge
OK.
