A balance determines the mass of object A to be 45.1 kg A different palance determines the mass of object B to be 33.46 kg If you were to add these two masses and round the result to the correct humber of significant figures what would their total mass be? Enter the answer

## Step 1<br />The problem involves the concept of significant figures in measurements. Significant figures are the digits in a number that carry some meaning regarding its precision. In this case, the measurements are 45.1 kg and 33.46 kg.<br /><br />## Step 2<br />The rule for adding or subtracting measurements is that the result should be reported with the same number of decimal places as the measurement with the fewest decimal places. In this case, the measurement with the fewest decimal places is 45.1 kg, which has one decimal place.<br /><br />## Step 3<br />So, we add the two measurements together to get 78.56 kg. However, we need to round this to one decimal place, which gives us 78.6 kg.