I attached the answer and explanation below
It would be C . You can figure it out by seeing how many times -4 goes into -28, which is 7 times. If you're not sure whether it is negative or positive then you could either use a calculator to check or remember this rule a negative times a negative is a positive which means your answer would have been 28 not -28.
We cannot determine the cost of the tiles from the given information, so the question cannot be answered.
This is exponential growth...
F=ar^t
F=25(1.15^t) so in six weeks...
F=25(1.15^6)
F≈57.82
F≈58 words per minute (to nearest whole word per minute)