exam Maths Puzzle Numerical Ability

The diameter of the Milky Way disc is approximately 9 x 10^20 meters. How long does it take light, traveling at 10^16 m/year to travel across the diameter of the Milky Way?

900

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exam Other Question

Please simplify.
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x/x-3<=-8/x-6 I need to solve and state the solution set. Thank you !!!