The first unit produced in a process takes 400 hours.As the number of units produced doubles,production time decreases by 20%.Using the arithmetic approach,calculate the production time for the 128th unit.
A)84 hours
B)256 hours
C)105 hours
D)72 hours

Question

Quizplus · Accepted Answer

The production time decreases by 20% each time the number of units doubles. Starting from 400 hours for the first unit, the sequence of production times is: 400, 320, 256, 204.8, 163.84, 131.072, 104.8576. The 128th unit corresponds to the 7th doubling, resulting in approximately 84 hours.

The First Unit Produced in a Process Takes 400 Hours