Can someone help me on this question

Factor the monomial completely 42a3b3

Cherie works in retail and her weekly salary includes commission for the amount she sells. the equation s=400+0.15c models the relation between her weekly salary, s, in dollars and the amount of her sales, c, in dollars. interpret the slope of the equation.

Which statement is true about the discontinuities of the function f(x) = x-5/ 3x^2-17x-28