Final answer:
After purchasing a pack of stickers for $2, Brooke has $28 left to spend on four coloring books, thus she can spend up to $7 on each coloring book.
Step-by-step explanation:
The question is about determining the most Brooke can spend on each coloring book when she has an overall spending limit at the mall. After buying a pack of stickers for $2, Brooke's remaining budget for coloring books is $30 - $2 = $28. Since she wants to buy four coloring books, we divide her remaining budget by the number of coloring books she will buy to find the maximum amount she can spend on each.
So, the most Brooke can spend on each coloring book is $28 ÷ 4 = $7.