1<evaluation>
 2   <qa_pair>
 3      <question>Calculate the compound interest on $10,000 invested at 5% annual interest rate, compounded monthly for 3 years. What is the final amount in dollars (rounded to 2 decimal places)?</question>
 4      <answer>11614.72</answer>
 5   </qa_pair>
 6   <qa_pair>
 7      <question>A projectile is launched at a 45-degree angle with an initial velocity of 50 m/s. Calculate the total distance (in meters) it has traveled from the launch point after 2 seconds, assuming g=9.8 m/s². Round to 2 decimal places.</question>
 8      <answer>87.25</answer>
 9   </qa_pair>
10   <qa_pair>
11      <question>A sphere has a volume of 500 cubic meters. Calculate its surface area in square meters. Round to 2 decimal places.</question>
12      <answer>304.65</answer>
13   </qa_pair>
14   <qa_pair>
15      <question>Calculate the population standard deviation of this dataset: [12, 15, 18, 22, 25, 30, 35]. Round to 2 decimal places.</question>
16      <answer>7.61</answer>
17   </qa_pair>
18   <qa_pair>
19      <question>Calculate the pH of a solution with a hydrogen ion concentration of 3.5 × 10^-5 M. Round to 2 decimal places.</question>
20      <answer>4.46</answer>
21   </qa_pair>
22</evaluation>