Q.21:
We are asked what f(3) = 32 means?
In Q.20, we are given the following function
[tex]f(x)=-2x^2+50[/tex]
Where f(x) is the height (in feet) of the apple and x is the time in seconds.
If we substittute x = 3 seconds into the function, we get the corresponding height of the apple.
[tex]\begin{gathered} f(3)=-2(3)^2+50 \\ f(3)=-2(9)+50 \\ f(3)=-18+50 \\ f(3)=32 \end{gathered}[/tex]
As you can see, the height of the apple is 32 feet at 3 seconds.
Therefore, the correct answer is the option (B)
The height of the apple at 3 seconds is 32 feet.
