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The volume of a rectangular prism is 
126ft^(3). Bob measures the sides to be 
9.48ft by 
7.21ft by 
1.93ft. In calculating the volume, what is the relative error, to the nearest thousandth.
Answer:

The volume of a rectangular prism is 126ft3 126 \mathrm{ft}^{3} . Bob measures the sides to be 9.48ft 9.48 \mathrm{ft} by 7.21ft 7.21 \mathrm{ft} by 1.93ft 1.93 \mathrm{ft} . In calculating the volume, what is the relative error, to the nearest thousandth.\newlineAnswer:

Full solution

Q. The volume of a rectangular prism is 126ft3 126 \mathrm{ft}^{3} . Bob measures the sides to be 9.48ft 9.48 \mathrm{ft} by 7.21ft 7.21 \mathrm{ft} by 1.93ft 1.93 \mathrm{ft} . In calculating the volume, what is the relative error, to the nearest thousandth.\newlineAnswer:
  1. Calculate Volume: Calculate the volume using the measured sides.\newlineVolume = Length×Width×Height\text{Length} \times \text{Width} \times \text{Height}\newlineVolume = 9.48ft×7.21ft×1.93ft9.48\,\text{ft} \times 7.21\,\text{ft} \times 1.93\,\text{ft}
  2. Perform Multiplication: Perform the multiplication to find the calculated volume.\newlineCalculated Volume = 9.48×7.21×1.939.48 \times 7.21 \times 1.93\newlineCalculated Volume = 131.611044ft3131.611044\text{ft}^3
  3. Find Absolute Error: Find the absolute error by subtracting the actual volume from the calculated volume.\newlineAbsolute Error = Calculated VolumeActual Volume|\text{Calculated Volume} - \text{Actual Volume}|\newlineAbsolute Error = 131.611044126|131.611044 - 126|\newlineAbsolute Error = 5.611044ft35.611044\text{ft}^3
  4. Calculate Relative Error: Calculate the relative error by dividing the absolute error by the actual volume.\newlineRelative Error = Absolute ErrorActual Volume\frac{\text{Absolute Error}}{\text{Actual Volume}}\newlineRelative Error = 5.611044126\frac{5.611044}{126}
  5. Perform Division: Perform the division to find the relative error.\newlineRelative Error 0.0445327\approx 0.0445327
  6. Round Relative Error: Round the relative error to the nearest thousandth.\newlineRelative Error 0.045\approx 0.045

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