Functions can be used to model real-life situations.
The function is given as:
[tex]\mathbf{\large S\left(x\right)=1.84x^3-201x^2+1910x+69,800 }[/tex]
(a) The graph of S(x)
See attachment
(b) The turning points
The turning point is the point where the graph changes from increasing to decreasing, and vice versa.
From the attached graph, we can see that the graph has no turning point.
(c) The range
The range is the possible y-values of the graph.
For 0 < x < 60, the y values starts from 0, and it increases upward.
This means that the range of the graph is: [tex]\mathbf{[0, \infty)}[/tex]
The range means that, a very large number of students enrol in the United States public school since 1958
Read more about graphs at:
https://brainly.com/question/16821641