When performing the calculation \( (209.6-116.81) / 8.3922 \), what is the correct answer, to the proper number of significant figures? 11.06 11.057 11 11.1 11.0567
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The Deep Dive
When performing the calculation \( (209.6 - 116.81) \), you first need to consider the significant figures. The number 209.6 has four significant figures, and 116.81 has five. Therefore, the result of the subtraction will be rounded to three significant figures, giving you \( 92.79 \). Now, dividing \( 92.79 \) by \( 8.3922 \) (which has five significant figures) results in \( 11.058 \). Rounding this to three significant figures (to keep the least count from the subtraction) gives you \( 11.1 \). So the correct answer is \( 11.1 \). When dealing with significant figures, it’s important to remember that the final answer should reflect the least precise measurement from the calculations involved, so rounding appropriately is vital. One common mistake is forgetting to account for the number of decimal places in subtraction, leading to incorrect rounding in the final result. Keep an eye on those significant figures!
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