Evaluate (0.631mm)/(8.60kg)2 to three significant figures and express in si units using an appropriate prefix.

solution;

The SI unit of measurement of length is meters and weight it is kilograms. So we have to convert mm to m and kilogram as it is.

Now since we need 3 significant digits, 10-6 is not significant as exponent is not significant. So the required answer is 8.53.