The actual dimensions of a rectangle are 7 in by 2in. Eric measures the sides to be 7.31 in by 1.91 in. In calculating the area, what is the relative error, to the nearest thousandth.Answer:
Q. The actual dimensions of a rectangle are 7 in by 2in. Eric measures the sides to be 7.31 in by 1.91 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 = 7in×2inActual area = 14in2
Calculate Measured Area: Next, calculate the measured area of the rectangle using the measured dimensions.Measured area = Measured Length × Measured WidthMeasured area = 7.31in×1.91inMeasured area = 13.9611in2
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 = ∣13.9611 in2−14 in2∣Absolute error = ∣−0.0389 in2∣Absolute error = 0.0389 in2 (since error is always positive)
Find 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 = (0.0389 in2/14 in2)×100%Relative error = 0.00277857143×100%Relative error = 0.277857143%
Round Relative Error: Round the relative error to the nearest thousandth.Relative error ≈0.278%