What is the product of the following numbers? Use a scientific calculator to find the answer. \( 4.92 \times 10^{3} \times 2.17 \times 10^{5} \) A. \( 5.7 \times 10^{14} \) B. \( 1.07 \times 10^{9} \) C. \( 1.07 \times 10^{15} \) D. \( 8.1 \times 10^{12} \)

7. If the terms 4,6 and 18 are in proportion. Find the third proportional.

Paman menanam pohon alpukat sebangak 350 pohon. Setiap pohon membutuhkan pupuk seberat \( 0,6 \mathrm{~kg} \) setiap enam bulan. Berapa kg pupuk yang harus disediakan paman adalah .... A. 210

Write each of the following percentages in decimal form. \( \begin{array}{ll}\text { (a) } 0.16=16 \% & \text { (b) } 0.153= \\ \text { (c) } 0.085=9 \% & \text { (d) } 0.025= \\ 1.35= & \text { (f) } 1.125=\end{array} \)

1.2. Between which two consecutive integers does \( \sqrt{138} \) lie? 1.3.1. Rewrite 92 and 146 as products of their prime factors. 1.3.2. Write down the LCM and HCF of 92 and 146 . 1.3.3. Divide 240 g in the ratio \( 5: 3: 4 \). 1.4. Thoriso can either walk to \( \mathrm{school} \mathrm{at} 5 \mathrm{~km} / \mathrm{h} \) or ride her bicycle at \( 15 \mathrm{~km} / \mathrm{h} \). If she rides her bicycle, it takes her 10 minutes to get to school. 1.4.1. How long will it take her if she walks to school? 1.4.2. Is this direct or indirect proportion? Give a reason for your answer. (2) 1.5. The price of petrol is increased from \( R 12,58 \) per litre to \( R 13,28 \) per lite.

Which of the following numbers is equal to the value shown in scientific notation below? \( 8.8 \times 10^{7} \) A. 880,000 B. \( 88,000,000 \) C. \( 8,800,000 \) D. \( 880,000,000 \)