Question

Is the real number sqrt1.21 rational or irrational?

Answer 1

First find the square root of 1.21. What is it?

Answer 2

You can rewrite 1.21 with its rational form,
\[1.21=\frac{121}{100}\]Now you can ask if
\[\sqrt{\frac{121}{100}}\] is rational or irrational.

Answer 3

ok, sqrt of 1.21 is 1.1 i think

Answer 4

making it rational.

Answer 5

Yes, 1.1. And 1.1 can be written as 11/10.
The definition of a rational number is that it can be written as a ratio of two integers.

Answer 6

Yes, it is rational.