1. **Problem 43: Divide $\frac{30}{60}$ by $\frac{1}{5}$.** 2. The formula for division of fractions is: $$\frac{a}{b} \div \frac{c}{d} = \frac{a}{b} \times \frac{d}{c}$$ 3. Apply the formula: $$\frac{30}{60} \div \frac{1}{5} = \frac{30}{60} \times \frac{5}{1}$$ 4. Simplify $\frac{30}{60}$ to $\frac{1}{2}$: $$\frac{1}{2} \times \frac{5}{1} = \frac{5}{2}$$ 5. So, the answer to Question 43 is $\frac{5}{2}$, which corresponds to option a. 6. **Problem 44: Solve the equation $9x = 36$.** 7. To solve for $x$, divide both sides by 9: $$x = \frac{36}{9}$$ 8. Simplify: $$x = 4$$ 9. So, the answer to Question 44 is $x=4$, which corresponds to option c.