the correct question is
Use calculator to find √(68.1) to the nearest hundredth
we know that
To the nearest 'hundredth' is the same as saying
'Round off to two decimal places
To do this you first have to determine the answer with a calculator to at least 3 decimal place
√68.1-------> 8.252
The rounding will happen at the 5. It will either stay 5 or round up to 6, depending on the next digit which is a 2.
The 2 is below 5, so the answer rounds down to give 8.25
the answer is
8.25