C.
*if using a calculator*
1/3= .333
square root 7 equals about 2.646
therefore, we know .333 (1/3) is the smallest out of the numbers and 2.646 (sqr root 7) is the biggest.
*if you cannot use a calculator*
We know 1/3 is less than 1 because 3/3 would equal 1 and we only have 1/3.
We don’t know the square root of 7, however we know that it has to be between 2 and 3 because the square root of 4 is 2 and the square root of 9 is 3. 7 is between those two numbers, so therefore we know that the square root would have to be between 2 and 3.
Knowing that, we could figure out that since 1/3 is less than 1 it would be the smallest. Since the sqr root of 7 is between 2 and 3, it would be bigger than 2 and the biggest out of the 3.
Conclusion:
The order is 1/3, 2, sqr root 7
