Answer:
(a) 2
(b) 2.25
(c) 12.5%
Explanation:
To solve this question we need to remember that

(a) 10 persons produce 160 valves in 8 hours, this implies a productivity of 2=160/(8x10)
(b) 2.25= 180/(8x10)
(c) Percentage change is given by (2.25-2)/2=.125
Answer:
In my opinion Jack believes in the efficiency wage theory. This theory states that an increase in wages will increase labor productivity, lower staff turnover and attract the best possible employees.
So when Jack increases his employees' salaries, their increased productivity will recoup the extra labor costs. At the end, Jack believes his profit will increase because of the higher wages he pays.
I just took the test online, It's Future Value.
OK so I just did some quick research and I found nothing pertaining to that question nor to the answer, so i believe that it is False.
Answer: The more narrowly we define a market, the more elastic the demand for a product will be.
Explanation: Narrowly defined markets tend to have more elastic demand than broadly defined markets because it is easier to find close substitutes for narrowly defined goods.
For example, a broad category of food, has a fairly inelastic demand because there are no good substitutes for food while Vanilla flavoured ice cream, a very narrow category, has a very elastic demand because other flavors of ice cream (e. g Chocolate) are perfect substitutes for vanilla.