（a）These are the distances above the surface of the Earth of five satellites，$$\(A, B, C, D\)$$ and $$\(E\)$$ ． Each distance is in kilometres． \begin{tabular}{ccccc} $$\(A\)$$ & $$\(B\)$$ & $$\(C\)$$ & $$\(D\)$$ & $$\(E\)$$ \\ 35800 & $$\(7.8 \times 10^{2}\)$$ & $$\(1.5 \times 10^{6}\)$$ & 535 & $$\(2 \times 10^{4}\)$$ \end{tabular} （i）Write these distances in order，starting with the shortest． ［2］ shortest （ii）The radius of Earth is 6370 km ． Satellite $$\(A\)$$ is $$\(k\)$$ times further from the centre of Earth than satellite $$\(D\)$$ ． Show that $$\(k=6.11\)$$ correct to 2 decimal places． ［2］ （c）A different satellite travels at a speed of $$\(25200 \mathrm{~km} / \mathrm{h}\)$$ ． Convert this speed into m／s． m／s ［2］

Answer:

Knowledge points:

Solution: