A hydrogen atom is about 5×10 to the -11 power –
11 meters across. The width of a human hair is 2×106 to 6 times as big. How many meters across is a human hair?
Write your answer in scientific notation.

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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