The answer to your question is D.
Answer:
2
(
45
⋅
67
)
−
56
=
5974
Step-by-step explanation:
X/4 - 4 =18
This is the correct equation and if you solve it it X=88
Answer:
and 
Step-by-step explanation:
To find the max points we need to take the derivative of the function and then find the critical values.
First we take the derivative:

Now we need to find when f'(x)=0 to find the critical values.

The critical values will be
for any integer n
between 0 and 2 pi, the critical values will be

We can determine if these are minimums or maximums by using the second derivative test.
So we need to take the second derivative;

We need to see if the second derivative is positive or negative to determine if it is a max or min.

Since the second derivative is negative at
and 
we know both of those are the x-values of maximums.
Answer: 129.81 m, roughly 130 m
Step-by-step explanation: Let me know if you need an explanation.