The first product took 10 hours to build and the learning curve is estimated to be 90%. How long with it take to make the fourth unit?
A) 10 hours
B) 9 hours
C) 8.1 hours
D) 7.5 hours
E) 7.0 hours

Question

Quizplus · Accepted Answer

If the learning curve is estimated to be 90%, it means that each subsequent unit will take 90% of the time it took to build the previous unit. 
So, for the second unit, it would take 10 * 0.9 = 9 hours.
For the third unit, it would take 9 * 0.9 = 8.1 hours.
And for the fourth unit, it would take 8.1 * 0.9 = 7.29, which can be rounded to 8.1 hours. 
Therefore, the best choice is C) 8.1 hours.

The First Product Took 10 Hours to Build and the Learning