7. Abby is ordering shirts for a volleyball team. • Abby pays a one-time fee of $12.
• Abby also pays $5 for each shirt ordered.
Which function can be used to find a, the amount that Abby pays in dollars when ,s, shirts
are ordered?

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."

i think it will be 4feet long of what i comprehend