The actual dimensions of a rectangle are 4ft by 2ft. David measures the sides to be 3.66ft by 1.79ft. In calculating the area, what is the relative error, to the nearest hundredth.Answer:
Q. The actual dimensions of a rectangle are 4ft by 2ft. David measures the sides to be 3.66ft by 1.79ft. In calculating the area, what is the relative error, to the nearest hundredth.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 = 4ft×2ft=8ft2.
Calculate Measured Area: Calculate the measured area of the rectangle using the measured dimensions.Measured area = 3.66ft×1.79ft.Let's perform the multiplication to find the measured area.Measured area = 6.5502ft2.
Calculate Absolute Error: Calculate the absolute error by subtracting the actual area from the measured area.Absolute error = ∣Measured area−Actual area∣.Absolute error = ∣6.5502ft2−8ft2∣.Absolute error = ∣−1.4498ft2∣.Since we are looking for the absolute value, we take the positive value of the result.Absolute error = 1.4498ft2.
Calculate Relative Error: Calculate the relative error by dividing the absolute error by the actual area.Relative error = Actual areaAbsolute error.Relative error = 8ft21.4498ft2.Let's perform the division to find the relative error.Relative error = 0.181225.
Convert to Percentage: Convert the relative error to a percentage and round to the nearest hundredth.Relative error (as a percentage) = Relative error ×100.Relative error (as a percentage) = 0.181225×100.Relative error (as a percentage) = 18.1225%.Rounded to the nearest hundredth, the relative error is 18.12%.