The actual density of iron is 7 point 8 7 4 g over mL In a laboratory investigation, Jason finds the density of a piece of iron to be 7 point 9 2 1 g over mL What is the percent error that is associated with Jason’s measurement?

Percent error is the absolute difference between the measured and actual values, divided by the actual value, then multiplied by 100. Here, |7.921 − 7.874| ÷ 7.874 × 100 ≈ 0.6%. The correct choice is 0.6 percent.

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