2. What is the area of a rectangle with length 8 cm and width 4 cm?

3. A survey showed that 60% of the participants prefer chocolate ice cream. If 300 people participated in the survey, how many preferred chocolate ice cream?

4. What is the value of $7^2$?

5. If the ratio of boys to girls in a class is 3:2 and there are 15 boys, how many girls are there?

6. What is the median of the following set of numbers: 3, 7, 9, 12, 14?

7. Simplify the expression $\frac{5x + 10}{5}$.

8. In a right-angled triangle, if one angle is $90^\circ$ and another angle is $30^\circ$, what is the measure of the third angle?

9. Convert $\frac{3}{4}$ to a percentage.

10. What is the slope of the line represented by the equation $2y - 4x = 8$?