the mean price of the nonfiction books on a best-sellers list is $21.66. The standard deviation is $2.09. If the prices of the top 10 best sellers all fall within two standard deviations of the mean, what is the lowest possible price of a book? what is the highest?

Which is the graph of f(x) = 0.5(4)x? the population of a town grows exponentially. after 1 year, the population is 34,560. after 2 years, the population is 37,325. which equation can be used to predict, y, the number of people living in the town after x years? (round population values to the nearest whole number.)