Answer:
The primary difference between those two concepts is focus that each term has. The first one focus on the relationship between the level of production and the level of return. While the second one focus on the relationship between the level of production and the amount of factors used for that production. 
Explanation:
One the one hand, the law of diminishing marginal returns is a concept known in the microeconomics theory due to the fact that it establishes the relationship between the productivity and the income for every aspect of it. Meaning that, when the productivity increases because of the increase of only one factor of production then the income will start to slowly decrease, confirming that when only one factor is increased the production will start to be incomplete and the return will decrease for that.
On the other hand, the law of diminishing marginal rate of technical substitution indicates the relationship between the level of output and the different factor used to produce. Meaning that, it shows how to keep the level of output the same while making changes in the amount of factors used. 
 
        
             
        
        
        
<em><u>The equation shows the relationship between her  weekly salary (w), hours per week (h), and rate per hour (r) is:</u></em>

<em><u>Solution:</u></em>
Given that,
Alice earned $12 per hour
1 hour = $ 12
<em><u>Find the number of hours in 1 week</u></em>
1 day = 24 hours
1 week = 7 days
Therefore,
1 week = 7 x 24 = 168 hours
Let "h" be the hours per week
let "r" be the rate per hour
Let "w" be the rate per hour
From given,
r = $ 12
h = 168 hours
weekly salary = hours per week x rate per hour


Thus, she earns $ 2016 for 1 week
 
        
                    
             
        
        
        
Solution :
According to the theory of demand and supply, the equilibrium price and the quantity is established where both the demand and supply curves intersect. 
From the graph, we can see that the point of equilibrium is at the intersection of D and S.
At this point, mathematically, D = S. In order to determine the price and quantity which exists at this point, we need to equate the demand as well as supply functions to calculate the equilibrium values. 
∵ D is equal to S, we have 



Now substituting this value of the equilibrium price in to any of the functions, we get the equilibrium quantity at this price.




This is the equilibrium quantity. At this point, equilibrium price as well as the quantity is the same. Let the price of the golf club increases from $120 to $140. So substituting the value to the function above to determine the new quantity. 

    = 100
Therefore, when the demanded quantity decreases from 120 thousand clubs to 100 thousand clubs. This increases the price and decreases the quantity as the supply curve moved to the left. The demand remains constant. 
 
        
             
        
        
        
I would say thats a business operations need! 
Hope this help! :)
        
             
        
        
        
Net cash flow is basically the difference of the cash balance from the beginning of the period to the end of the period. For this instance, we take sales and subtract the listed expenses. 
January = 150,000 - 35,000- 20,000 -20,000 = 75,000 net cash flow
February = 175,000 - 39,000 - 25,000 - 45,000 = 66,000 net cash flow
For the change you divide (February/January) -1 or (66,000/75,000)-1= -.12
The growth in cash flow was -12%