The graph of the function 
is
- concave upward, when
- concave downward, when
Find 
1.
2.
Now:
1. when 
the graph of the function is concave upward and this is for
2. when 
the graph of the function is concave downward and this is for
The answer is 27.29 trust
The second bubble is the correct answer i believe...
Answer:
I'm sorry I don't have answer but.
it's not C!
Answer: he must work for at least 26.32 hours
Step-by-step explanation:
Let x represent the number of hours that Hayden works as a life guard.
Hayden earns $9.50 per hour as a lifeguard. This means that the amount that he earns for working for x hours would be
9.5x
He earns a bonus of $50.00 for taking a training course. If he takes this bonus cost, the amount that he would earn for working for x hours is
9.5x + 50
Therefore, the number of hours that he must work to earn at least $300.00 would be
9.5x + 50 ≥ 300
9.5x ≥ 300 - 50
9.5x ≥ 250
x ≥ 250/9.5
x ≥ 26.32
