- #1

- 24

- 0

So I did this:

f(x) { .99(6) 0<= x

.99(20) 0=> x >= 20

Not a clue what I'm doing...

- Thread starter Rusho
- Start date

- #1

- 24

- 0

So I did this:

f(x) { .99(6) 0<= x

.99(20) 0=> x >= 20

Not a clue what I'm doing...

- #2

VietDao29

Homework Helper

- 1,423

- 2

------------------------

If you make a y-minute phone call (y > 20), i.e a phone call that lasts

------------------------

Your function will look like this:

[tex]f(x) := \left\{ \begin{array}{l} ... , \quad \quad \mbox{if } 0 \leq x \leq 20 \\ ... , \quad \quad \mbox{if } x > 20 \end{array} \right.[/tex]

Can you go from here? :)

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