I will give Brainiest Answer for whoever helps me!!
I need help adding and subtracting in Scientific Notation... (the ^ means the power)
1. (6 x 10^1) + (9 x 10^1)
2. (7 x 10^0) + (3 x 10^1)
3. (8.8 x 10^2) + ( 3 x 10^2)

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