[larryjay]

Ok thank you.

I have watched the lectures

I understand that, but the only thing that is confusing me is how to put it in my calculator to get the right answer.

[larryjay]

@johnmoffat said:
The average time for 16 batches is 8500/16 = 531.25 hours per batch.

Using the doubling rule, and given the fact that 16 involves doubling 4 times, then:

r^4 = 531.25/750

Therefore r = fourth root of (531.25/750) = 0.92 or 92%

This is all explained in my free lectures on learning curves. The lectures are a complete free course for Paper PM and cover everything needed to be able to pass the exam well.

sorry, how is this put into the calculator to get the 0.92? i understand everything except that last equation.

[Author]

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