Question

Evaluate √0•4 correct up to two places of decimal

Answer 1

Step-by-step explanation:

First guess: √0.4 = 0.6. Now 0.6^2 = 0.36, which is 10% too low. Now if x is an approximation to √y, then it can be shown that (x + y/x)/2 will be a closer approximation. So try (0.6+0.4/0.6)/2 = 19/30 = 0.63333…