It took 100 hours to produce the first unit and 95 hours to produce the second unit. How many hours are required to produce the eighth unit? [Note: a calculator is required to answer this question.]
A) fewer than or equal to 60 hours
B) greater than 60 hours but fewer than or equal to 75 hours
C) greater than 75 hours but fewer than or equal to 90 hours
D) greater than 90 hours

Question

Quizplus · Accepted Answer

The time taken to produce the units is decreasing at a rate of 5 hours per unit. Therefore, to produce the eighth unit, we need to subtract 5 hours from the time taken to produce the second unit (95 hours). This gives us 90 hours, which falls under the range of greater than 75 hours but fewer than or equal to 90 hours. Hence, the answer is choice C.

It Took 100 Hours to Produce the First Unit and 95