Suppose that you measure a pen to be 10.6 cm long. convert this to meters. express the length in meters to three significant figures.

Use dimensional analysis:

Since we multiplied a numerator and a denominator by centimeters, we are only left with meters.

This answer is already is three significant figures by default.

square root of 36/6 = 2.449489743

square root of 16/6 = 1.632993162

square root of 6 = 2.449489743

the answer is square root of 16/6 because the square root of 36/6 is the same answer as square root of 6 = 2.449489743

she was supposed to add the hours(38.5) and multiply the amount of money she earned(7.50) resulting in $288.75 .

correct me if i'm wrong and if it is i'm truly sorry.