Well in my answer i got 5.06 i rounded to the nearest hundred instead of putting all of the numbers behind the 6.
We have the function:

A turning point happens when the function reaches a maximum or a minimum.
In that points the value of the first derivative of the function is equal to 0.
So we can find the turning points by finding the first derivative and equal to zero:
Answer is in the file below
tinyurl.com/wpazsebu
Answer:
number 1 is 2 number 2 is 15 number 4 is 30
Step-by-step explanation:
Answer:
AC = 3.06
Step-by-step explanation: