A guppy was swimming 18 feet below the surface of the river. It swam 9 feet deeper to escape a larger fish. What is the position of the guppy now relative to the surface?

Ibelieve it is

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