Question

1. Carol owns Virgil’s Electrical Corporation. She needs an electrician and is placing a nine line classified ad. The cost of an ad that is x lines long is given by the following piecewise function. Find the cost of a nine-line ad. 28 when 3 ( ) 28 4( 3) when 3 x c

Answer 1

The cost of 9 line ad is #52

Step-by-step explanation:

Given

`f(x) = 28` ---
`x \le 3`

`f(x) = 28 + 4(x - 3)` ---
`x > 3`

Required

The cost of a 9 line ad

This means that:

`x = 9`

To calculate the cost, we make use of:

`f(x) = 28 + 4(x - 3)` ---
`x > 3`

Because
`9 > 3`

So, we have:

`f(x) = 28 + 4(x - 3)`

`f(9) = 28 + 4 * (9 - 3)`

`f(9) = 28 + 4 * 6`

`f(9) = 28 + 24`

`f(9) = 52`