PLEASE I JUST NEED THIS QUESTION

Which is the completely factored from of xy^3-x^3y

Tod does not have any cookies. david gives jeff 8 cookies. then he splits half of the cookies he has left with tod. david let’s c represent the number of cookies that he starts with. he finds the number of cookies that tod has is 1/2 the difference of c and 8. write an expression to represent the number of cookies that tod has.

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c