Caroline has recently developed a new product. The nature of Caroline’s work is repetitive, and it is usual for there to be an 80% learning effect when a new product is developed. The time taken for the first unit was 22 minutes. An 80% learning effect applies. What is the time to be taken for the fourth unit in minutes?
A、17.6 minutes
B、14.08 minutes
C、15.45 minutes
D、9.98 minutes
A、17.6 minutes
B、14.08 minutes
C、15.45 minutes
D、9.98 minutes
【参考答案及解析】