Suppose that a person requires eight hours to complete a work element on the first attempt.That person has a learning rate of 90 percent for this work element.This person should require __________ hours to complete this work element on the fourth attempt.
A)5.83
B)6.48
C)7.2
D)8.8

Question

Quizplus · Accepted Answer

The formula for calculating the time required on the nth attempt is:

time = baseline time x (learning rate)^n

Plugging in the given values:
baseline time = 8 hours
learning rate = 90% = 0.9
n = 4

time = 8 x (0.9)^4

time ≈ 7.2 hours (rounded to one decimal place)

Therefore, the answer is C (7.2).

Suppose That a Person Requires Eight Hours to Complete a Work