Answer:
They should operate Mine 1 for 1 hour and Mine 2 for 3 hours to meet the contractual obligations and minimize cost.
Explanation:
The formulation of the linear programming is:
Objective function:
Restrictions:
- High-grade ore: 
- Medium-grade ore: 
- Low-grade ore: 
- No negative hours: 
We start graphing the restrictions in a M1-M2 plane.
In the figure attached, we have the feasible region, where all the restrictions are validated, and the four points of intersection of 2 restrictions.
In one of this four points lies the minimum cost.
Graphically, we can graph the cost function over this feasible region, with different cost levels. When the line cost intersects one of the four points with the lowest level of cost, this is the optimum combination.
(NOTE: it is best to start with a low guessing of the cost and going up until it reaches one point in the feasible region).
The solution is for the point (M1=1, M2=3), with a cost of C=$680.
The cost function graph is attached.
Answer:
D
Explanation:
Sales mix is a ratio of products sold. In this case, sales by golf ball type as a percentage of total sales is the sales mix as it shows the ratio of product sold.
Answer:
However, the economy has been characterised by a structural shift in output over the past four decades.
Since the early 1990s, economic growth has been driven mainly by the tertiary sector – which includes wholesale and retail trade, tourism and communications. Now South Africa is moving towards becoming a knowledge-based economy, with a greater focus on technology, e-commerce and financial and other services.
Among the key sectors that contribute to the gross domestic product and keep the economic engine running are manufacturing, retail, financial services, communications, mining, agriculture and tourism.
Explanation:
South Africa’s economy has traditionally been in the primary sectors – the result of a wealth of mineral resources and favourable agricultural conditions.
Wyatt's<u> effective interest rate</u> would be greater than his <u>nominal interest rate </u>by 0. 71 percentage points.
The <em>nominal interest rate</em> is 13. 62% or 0.1362 that would be given an <em>effective rate of interest </em>as follows:
Here, the value of the effective rate of interest<u>,</u> that is 0.1433 that would be multiplied with 100 to get the <u>percentage value</u> of 14.33%
Hence, the <u>difference between effective and nominal interest rates</u> would be:
Learn more about the effective and nominal rates of interest here:
brainly.com/question/2787260
Increasing market power allows firms to raise prices and not lose customers. This is a way to increase revenues without increasing cost.
