Answer:

Step-by-step explanation:
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ANSWER
The turning point is

EXPLANATION
The function given to us is

At turning point,

So we need to differentiate the given function and equate it to zero.
We using the chain rule of differentiation, we obtain,

We equate this to zero to obtain,

We divide through by 3.

We solve for x to get,


We substitute this x-value in to the function to obtain the corresponding y-value of the turning point.



Therefore the turning point is

C is the correct answer.
There should be a .94 increase making it be 141.94 at the end of the week.
Answer:
t ≥ 10
Step-by-step explanation:
Since the student needs at least 10 hours of driving time, they need greater than or equal to 10 hours to pass.