Ajob has a 90% learning curve. if the first unit took 10 hours to complete, the fifth unit should take roughly how many hours?

Given the 90 percent learning curve that a given job or employment type may have, if it took the first unit roughly ten hours to complete the curve, then the fifth set would have a learning curve that took eight hours to learn and understand the variations and issues inherent.

C. expression because any expression or equation may contain more than one variable