Answer:
90 arrangements
Step-by-step explanation:
Since there are no repititions of letters, there are unique 10 letters in total.
THe number of arrangements would be 2 permutation 10. We need the formula for permutation. That is:

Now, n = 10 [total] and r is 2, so we have:

So, there can be 90 arrangements
Answer:
0.15
Step-by-step explanation:
I don't know if that is right but sorry if it is wrong but I would check with your teacher or someone for help
Answer:
-3 3/7
Step-by-step explanation:
Hope this helps!:)
Answer:
$1.11
Step-by-step explanation:
Find the price per roll by dividing the cost by the number of rolls:
9.99/9
= 1.11
So, the price per roll of toilet paper is $1.11
Solving for s, I get s = 12.