The actual dimensions of a rectangle are 3cm by 9cm. Alex measures the sides to be 3.29cm by 9.22cm. In calculating the area, what is the relative error, to the nearest thousandth.Answer:
Q. The actual dimensions of a rectangle are 3cm by 9cm. Alex measures the sides to be 3.29cm by 9.22cm. In calculating the area, what is the relative error, to the nearest thousandth.Answer:
Calculate Actual Area: Calculate the actual area of the rectangle using the actual dimensions.The formula for the area of a rectangle is length×width.Actual area = 3cm×9cm=27cm2.
Calculate Measured Area: Calculate the measured area of the rectangle using the measured dimensions.Measured area = 3.29cm×9.22cm.Let's perform the multiplication to find the measured area.Measured area = 30.3348cm2.
Calculate Absolute Error: Calculate the absolute error in the area.Absolute error = ∣Measured area−Actual area∣.Absolute error = ∣30.3348cm2−27cm2∣.Absolute error = 3.3348cm2.
Calculate Relative Error: Calculate the relative error.Relative error = Actual areaAbsolute error.Relative error = 27cm23.3348cm2.Let's perform the division to find the relative error.Relative error ≈0.123511.
Express Relative Error: Express the relative error to the nearest thousandth.To express the relative error to the nearest thousandth, we round it to three decimal places.Relative error ≈0.124 (rounded to the nearest thousandth).