When doing this question, first, you will add your $9.99. Now, you take your $0.03 times the numbers of minutes. Finally, you'll add the $9.99 to the final cost of your minutes to get your answer.
I believe that she will need 56 square tiles. You get this by doing 7 times 8 which is 56. Then, since each tile is a one-foot square tile, you would need 56 tiles to cover the whole floor.
