Answer:
4.428 hours
Step-by-step explanation:
If the learning rate is 0.81, the slope of the learning curve is:

The time it takes to produce the n-th unit is:

If T1 = 8 hours, the time required to produce the seventh unit will be:

It will take roughly 4.428 hours.
Answer:
2.68
Step-by-step explanation:
25/67 = 2.68
For number 2 it's would be 12.8
Sorry I don't have time for number 3
A number that is greater than 714,587 is 1,000,000