The actual dimensions of a rectangle are 4 in by 9 in. Eric measures the sides to be 3.87 in by 9.22 in. In calculating the area, what is the relative error, to the nearest thousandth.Answer:
Q. The actual dimensions of a rectangle are 4 in by 9 in. Eric measures the sides to be 3.87 in by 9.22 in. In calculating the area, what is the relative error, to the nearest thousandth.Answer:
Calculate Actual Area: First, calculate the actual area of the rectangle using the actual dimensions.Actual area = length × widthActual area = 4 in ×9 inActual area = 36 in2
Calculate Measured Area: Next, calculate the measured area of the rectangle using the measured dimensions.Measured area = measured length × measured widthMeasured area = 3.87in×9.22inMeasured area = 35.6824in2
Find Absolute Error: Now, find the absolute error by subtracting the actual area from the measured area.Absolute error = ∣Measured area−Actual area∣Absolute error = ∣35.6824 in2−36 in2∣Absolute error = ∣−0.3176 in2∣Absolute error = 0.3176 in2 (since absolute error is always positive)
Calculate Relative Error: To find the relative error, divide the absolute error by the actual area and express it as a percentage.Relative error = (Absolute error/Actual area)×100%Relative error = (0.3176 in2/36 in2)×100%Relative error = 0.00882222222...×100%Relative error = 0.882222222...%
Round Relative Error: Finally, round the relative error to the nearest thousandth.Relative error ≈0.882%