Not sure how to even start this problem

Explanation:

DeMoivre's theorem tells you the 7th roots of unity are the 7 points evenly spaced around (on) the unit circle, including 1∠0°. They will be located at angles ...

  {0, 2π/7, 4π/7, 6π/7, 8π/7, 10π/7, 12π/7} . . . in radians

Given that the circle shown is graduated in increments of π/6, you will need to do some estimating as to the actual location of the root.

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The attached graph shows lines at increments of π/7 radians, so your graph will match every other one.

6 hours 48 min

step-by-step explanation:

68÷5=13.6

13.6×30=408min=6 hours 48 min.

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$79500

step-by-step explanation: