On a standardized exam, the scores are normally distributed with a mean of 200 and a standard deviation of 50. Find the z-score of a person who scored 140 on the exam.

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