simplify, and write using only positive exponents. variables are non-zero (x^-4)^2(x^-2y^3)^2 (x^-2y^-3)^2

Something is wrong with your thing

So don't take my word i'm not exactly a mathematical person but i would assume a. because while selling the soap every month you increase in sells so you would by 11 percent. the you would get the factor 0.89 which if i had to guess would be the monthly profit over 11 probably wrong tho