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Heather estimated the volume of her bathtub to be 38 gal. The actual volume of her bathtub was 35 gal. Find the absolute error and the percent error of Heather's estimate. If necessary, round your answers to the nearest tenth. absolute error \( =\square \mathrm{gal} \) percent error \( =\square \% \)

Ask by Graham Wang. in the United States
Feb 19,2025

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Answer

Absolute error \( = 3 \text{ gal} \) Percent error \( = 8.6\% \)

Solution

To find the absolute error and the percent error of Heather's estimate, we can follow these steps: 1. **Calculate the Absolute Error:** The absolute error is the difference between the estimated value and the actual value. It can be calculated using the formula: \[ \text{Absolute Error} = |\text{Estimated Value} - \text{Actual Value}| \] 2. **Calculate the Percent Error:** The percent error is calculated using the formula: \[ \text{Percent Error} = \left( \frac{\text{Absolute Error}}{\text{Actual Value}} \right) \times 100\% \] Now, let's plug in the values: - Estimated Value = 38 gal - Actual Value = 35 gal ### Step 1: Calculate the Absolute Error \[ \text{Absolute Error} = |38 - 35| = |3| = 3 \text{ gal} \] ### Step 2: Calculate the Percent Error \[ \text{Percent Error} = \left( \frac{3}{35} \right) \times 100\% \] Now, let's calculate the percent error. \[ \text{Percent Error} = \left( \frac{3}{35} \right) \times 100 \approx 8.5714\% \] Rounding to the nearest tenth: \[ \text{Percent Error} \approx 8.6\% \] ### Final Answers: - Absolute error \( = 3 \text{ gal} \) - Percent error \( = 8.6\% \)

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To find the absolute error, subtract the actual volume from the estimated volume. So, \( 38 \, \text{gal} - 35 \, \text{gal} = 3 \, \text{gal} \). Therefore, the absolute error is 3 gal. For the percent error, use the formula: \( \frac{\text{absolute error}}{\text{actual value}} \times 100 \). Plugging in the values gives \( \frac{3 \, \text{gal}}{35 \, \text{gal}} \times 100 \approx 8.6\% \). Thus, the percent error is approximately 8.6%.

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