Q. Bob measures a line to be 8.4ft long. If the actual measurement is 8ft, find Bob's relative error to the nearest thousandth.Answer:
Understand relative error: Understand the concept of relative error. Relative error is the absolute value of the difference between the measured value and the actual value, divided by the actual value. It is often expressed as a percentage or a decimal.
Calculate absolute error: Calculate the absolute error.The absolute error is the difference between the measured value and the actual value.Absolute error = ∣Measured Value−Actual Value∣Absolute error = ∣8.4ft−8ft∣Absolute error = ∣0.4ft∣
Convert to nearest thousandth: Convert the relative error to the nearest thousandth.To express the relative error to the nearest thousandth, we keep three decimal places.Relative error = 0.050
Check for correct expression: Check if the relative error is expressed correctly.The relative error is 0.050, which is correctly rounded to the nearest thousandth.