Question

What's the square root of 20 to the nearest tenth

Answer 1

If you know your square roots, you know the number should be between 4 and 5 because 4^2 is 16 and 5^2 is 25. The answer is 4.4721 but rounded it should be 4.5 because the 7 is more than 5 and it should be rounded up.

Answer 2

The answer is 4.5. Hope this helps.