Final answer:
The unused capacity of Tangerine Company's engineers, considering their ability to process orders, is 8,000 orders, which is the difference between the total capacity (108,000 orders) and the actual orders processed (100,000 orders).
Step-by-step explanation:
The student's question involves calculating the unused capacity of the Tangerine Company's engineers in processing orders. To find this, we first determine the total capacity by multiplying the number of engineers by the number of orders each can process in a year. Since there are nine engineers and each can process 12,000 orders, the total capacity is 9 engineers × 12,000 orders/engineer = 108,000 orders/year. Then, we subtract the actual orders processed last year from this capacity to find the unused capacity: 108,000 orders - 100,000 orders = 8,000 orders unused capacity. Therefore, the correct answer is d. 8,000 orders.