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:
Begin and end your presentation with motivating context
Explanation:
Just as the hourglass is shaped with a large top, narrow middle and a large bottom. Presentations should start on a general and motivational context.
The middle of the presentation should focus on some details and procedures on how to achieve set goals and objectives of the topic. This is where practical steps are given to the audience.
The end of the presentation should again be a motivational context again. The audience is made to see the big picture of the situation.
A prokaryotic cell wall that has primarily peptidoglycan with small amounts of teichoic acid and lipoteichoic acid is: gram positive.
<h3>What is a prokaryotic cell wall?</h3>
The prokaryotic cells are known to have strong cell walls. These are known to be located under a particular capsule. The function is to help in the maintenance of shape and also help in the protections of the interior parts of the cells.
Hence we can say that: A prokaryotic cell wall that has primarily peptidoglycan with small amounts of teichoic acid and lipoteichoic acid is: gram positive.
Read more on prokaryotic cell wall here: brainly.com/question/14771066
#SPJ1
Answer:
If the social cost of an activity exceeds the costs relevant to the decision makers in the activity , there is an external diseconomy . If the benefits of an activity exceed its marginal cost , there is an external economy .
Explanation:
Thaats whaaat upp