Find the margin of error using standard deviation 109,105,112,110,115,106,108,109.

Is the problem written 10 times the square root of 72?
If so, 36 x 2= 72, so you can pull the square root of 36, or 6 out from under the radical.

So 10 x 6 = 60 would be to the left side of the radical, and all you would have left under the radical sign would be 2.