ANSWER
C. 3.25
EXPLANATION
We are given the function:
[tex]f(x)=x^2\text{ + 4x + 1}[/tex]The output of the function is f(x) and the input is x.
So, we want to find f(x) when x is 0.5.
That is:
[tex]\begin{gathered} f(0.5)=0.5^2\text{ + (4 }\cdot\text{ 0.5) + 1} \\ f(0.5)\text{ = 0.25 + 2 + 1} \\ f(0.5)\text{ = 3.25} \end{gathered}[/tex]That is the ouput.
