Given
[tex]C(x)=\begin{cases}{39.99,0350.}\end{cases}[/tex]
To find: 1) 215, 2) 390, 3) 351.
Explanation:
It is given that,
[tex]C(x)=\begin{cases}{39.99,0350.}\end{cases}[/tex]
That implies,
1) For x=215<350.
[tex]C(215)=39.99[/tex]
2) For x=390>350.
Then,
[tex]\begin{gathered} C(390)=0.25(390)-47.51 \\ =97.5-47.51 \\ =49.99 \end{gathered}[/tex]
3) For x=351>350.
Then,
[tex]\begin{gathered} C(351)=0.25(351)-47.51 \\ =87.75-47.51 \\ =40.24 \end{gathered}[/tex]
Hence, the answer is 1) 39.99, 2) 49.99, C) 40.24.
