Your problem is too spaced out too understand! Next time make sure he spacing is more understandable and readable! sorry
If you would like to know what is the unit price for the hair shampoo, you can calculate this using the following steps:
500 ml ... $2.10
100 ml ...$x = ?
500 * x = 2.10 * 100 /500
x = 2.10 * 100 / 500
x = $0.42
The unit price for the hair shampoo is $0.42.
I think it might be r= -3
The answer is A. Hope this helps
