-12=b/8 show how you got the answer

A.) -20
B.) -4
C.) -96
D.) -1 1/2

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