Solution :
The average number of the arrivals, λ = 6 per hour
Average service rate, 
= 8
Average number of the customers in the system is given by,


= 3
Average number of the customers that are waiting in the line behind the person who are being served is,


= 2.25
Proportion of the time the server is busy,


= 0.75
Answer: Product-oriented layout
Explanation: The product-oriented layout is a production procedure where the materials and tools are located at the assembly lines.
This layout reduces the cost and time used in the handling of machines whereby optimizing the use of space. The product-oriented layout is mostly used when the same products are made without differences.
When total utility starts to decrease, each additional song hurts MORE than the previous song.
Answer: B. The capital gains yield is positive.
Explanation:
The Capital Gains Yield is a percentage figure that tells how much an investment has increased in price from it's acquisition.
It works by taking the new value and dividing it by the original value.
Using Stacy as an example, the Stock increased by $4 so assuming she bought the stock for even $0.1 then her Capital Yield is,
= 4/0.1
= 40 * 100%
= 4000% which is positive
As long as the stock was sold for more than it was bought, Capital Yield Gain is positive.