Answer:
4
Step-by-step explanation:
because y is 90 and x is 20 so z is 71
Answer:
The difference is 30%
Step-by-step explanation:
To find the percent decrease, start by finding the difference in costs.
42.54 - 29.78 = 12.76
Now divide that amount by the original cost.
12.76/42.54 = 30%
Answer:
C) 
The slope of the perpendicular line 
Step-by-step explanation:
<u><em>Explanation:-</em></u>
Given that the slope of the given line is

The slope of the perpendicular line
= 
The slope of the perpendicular line
= 
<u><em>Final answer</em></u>
The slope of the perpendicular line

Answer:
a. 
b. 
c.


Step-by-step explanation:
a) The marginal cost function is given by the derivative of the total cost function, in this way the marginal cost function for this company is:

b) The income function is given by the relation
.
The marginal revenue function for the company is given by the derivative of the revenue function, in this way the marginal revenue function is:

(c) The profit function of the company is given by the relation
, and the marginal utility function is given by the derivative of the utility function, in this way , the marginal utility function is:

When q = 2000, the marginal utility is:

When q = 7000, the marginal utility is:
