Question

Please help me with the picture below and their parts

Answer 1

Given

$C(x)=\begin{cases}{39.99,0350.}\end{cases}$

To find: 1) 215, 2) 390, 3) 351.

Explanation:

It is given that,

$C(x)=\begin{cases}{39.99,0350.}\end{cases}$

That implies,

1) For x=215<350.

$C(215)=39.99$

2) For x=390>350.

Then,

$\begin{gathered} C(390)=0.25(390)-47.51 \\ =97.5-47.51 \\ =49.99 \end{gathered}$

3) For x=351>350.

Then,

$\begin{gathered} C(351)=0.25(351)-47.51 \\ =87.75-47.51 \\ =40.24 \end{gathered}$

Hence, the answer is 1) 39.99, 2) 49.99, C) 40.24.