For this case we have the following quadratic functions:
Revenue: 
Cost: 
Then, we observe that the profit is given by the following mathematical relationship:

Substituting values we have:

Making the corresponding calculations we have:

Answer:
An expression that represents the profit is:

There is no picture so i am not sure what to tell u
Answer:
domain -infinity
range(6)
Step-by-step explanation:
Answer:
4.25 i think
Step-by-step explanation:
sorry i have not done these in a while it might be wrong
Answer:
Option (3). 120° will be the answer.
Step-by-step explanation:
By using the theorem of secants intersecting externally,
Measure of angle formed by two secants, from a point outside the circle is half the difference of the measures of the intercepted arcs.
m∠C = 
36° = 
72° =
°
= 72 + 48
= 120°
Therefore, Option (3) is the answer.