Answer:
a) $109
b) 
c) 
Step-by-step explanation:
a) The marginal cost, or the cost per additional unit, is given by the derivate of the cost function:

b) Profit is given by Revenue minus Cost:

c) The marginal profit for 8 units, is given by the difference in profit for 9 units and 8 units:

The length of AC is 126 units.
<h3>
Answer: x = 45</h3>
Work Shown:
x+x+90 = 180 .... all three angles of a triangle add to 180
2x+90 = 180
2x = 180-90
2x = 90
x = 90/2
x = 45
This is a 45-45-90 right triangle. We also consider it an isosceles right triangle because the base angles (45) are equal.
Answer:
Question 4: 20 + 6 + 6 + 12 + 16 = 60 
Question 5: 144 + 90 + 90 + 48 + 48 = 420 
Question 6: 78.28 + 78.28 + 88.58 + 27.09 + 27.09 = 299.32 
Step-by-step explanation:
Hope this helps!