A zookeeper predicted the weight of a new baby elephant to be 272 pounds when it was born. The elephant actually weighed 304 pounds at birth. What was the percent error of the zookeeper's prediction?

To calculate the percent error, you can use the formula:

\[ \text{Percent Error} = \left( \frac{\text{Actual Value} - \text{Predicted Value}}{\text{Actual Value}} \right) \times 100 \]

In this case:

• Actual Value (weight of the baby elephant) = 304 pounds
• Predicted Value (weight predicted by the zookeeper) = 272 pounds

Now plug in the values:

\[ \text{Percent Error} = \left( \frac{304 - 272}{304} \right) \times 100 \]

\[ = \left( \frac{32}{304} \right) \times 100 \]

Now calculate:

\[ \frac{32}{304} \approx 0.105263 \]

Then multiply by 100 to get the percentage:

\[ 0.105263 \times 100 \approx 10.53% \]

Thus, the percent error of the zookeeper’s prediction is approximately 10.53%.

The answer is B. 10.53%.