Why is $9<\sqrt{89}<10$? Explain why $9<\sqrt{89}<10$. How do you explain this? I'm doing revision and we haven't been taught it yet but it will be on the test.
$\sqrt{389}$ is also between two consecutive whole numbers.
What are the two numbers?

I got it, it's $19^2=361$ and $20 =400$ for the two  consecutive numbers on both sides of $\sqrt{389}$.
