Okay. The square root of 2 is between the square root of 1 and 4, which is greater than 1, but less than 2. In decimal form, that is about 1.41, which is greater than 1.4. 3/4 (0.75) is less than 0.7575757575, because 3/4 terminated, while the other decimal repeats. With that being said, here are the numbers ordered from least to greatest.
3/4, .75 decimal repeating, 1.4, square root of 2
