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.
Yes both rates are equivalent
I'm pretty sure the above fractions are equivalent because if you reduce 5s/15t then it equals s/3t.
Its kinda the same as the A just in the negative
