exam Maths Puzzle Numerical Ability

u/3 = 1/(2u-1)
I didn't get this problem because it had "squared (^2)" in it. PLease help, thanks!

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exam Other Question

A space shuttle 240 miles above the earth orbits the earth every 5 hours. How far (to the nearest 10 miles) does the shuttle travel in 1 hour? ( The diameter of the earth is approximately 8000 miles)[Theta=s/r] A.) Arctan(tan 315 degrees)

B.)Arctan (tan 150 degrees)