Solve the following word problems involving integers: 21. A player starts with 25 points and loses 40 points. What is their final score? 22. The temperature at midnight was -3°C and rose by 11°C by no

here are the solutions to the word problems:

Section C: Word Problems

21. Step 1: Start with the initial score and subtract the points lost.

    $$25 - 40 = -15$$

    The player's final score is $\boxed{-15 \text{ points}}$.

22. Step 1: Start with the midnight temperature and add the rise in temperature.

    $$-3^\circ\text{C} + 11^\circ\text{C} = 8^\circ\text{C}$$

    The temperature at noon was $\boxed{8^\circ\text{C}}$.

23. Step 1: Start with the initial elevation and subtract the distance descended.

    $$450 \text{ metres} - 620 \text{ metres} = -170 \text{ metres}$$

    His new elevation is $\boxed{-170 \text{ metres}}$.

24. Step 1: Represent the loss as a negative number and the profit as a positive number, then add them to find the overall result.

    $$-8000 + 12000 = 4000$$

    The overall result for the two months was a profit of $\boxed{\text{K}4000}$.