Which is a better approximation of the square root of20, 4.5 or 4.47

4.47

Step-by-step explanation:

Given :

To Find : Which is a better approximation

Solution:

20 lies between two perfect squares i.e. 16 and 25

Square root of 16 = 4

Square root of 25 = 5

So, Square root of 20 must lie between 4 and 5

Using calculator

The

Hence a better approximation of the square root of 20 is 4.47.

5

step-by-step explanation:

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.