book Maths Puzzle Numerical Ability

Megrez, the nearest of the Big Dipper stars, is 6.6 x 10^17m from the Earth. Approximately how long does it take light, traveling at 10^16m/year, to travel from Megrez to the Earth?

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book Other Question

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ignore the dots, they are filler to line everything up.
a) 5x-20
b) 2x+8
c) blank
d) 6x+ what is the volume and surface area of a cylinder whose dimensions are height 3cm and radius 4cm