2. Based on Problems 1 and 2 , does the addition of integers always mean the sum is positive? Explain.

3.1. Simplify each of the following ratios: 3.1.1. \( 4: 28: 16 \) 3.1.2. \( 6: 1.25: 2.5 \) 3.1.3. \( 3.6: 27: 13.5 \) 3.2. Distribute \( R 24000.00 \) in the ratio 2:1:5.

1.1.1. A prime number between 5 and 16... A. 17 B. 7 C. 20 D. 21

4.Представьте произведе \( \left(4,6 \cdot 10^{4}\right) \cdot\left(2,5 \cdot 10^{-5}\right) \)

10) A loaded truck travels 14 km in \( 25 \mathrm{minutes} \). If the speed remains the same, how far can it travel in 5 hours?

(ii) \( \begin{array}{r}5.129 \times(-0.15) \\ .23 \\ 5.129 \times 6\end{array} \)