Mathematics, 10.03.2020 09:13 fseftrwer4378

Suppose the mean income of firms in the industry for a year is 90 million dollars with a standard deviation of 7 million dollars. If incomes for the industry are distributed normally, what is the probability that a randomly selected firm will earn less than 97 million dollars? Round your answer to four decimal places.
I need help learning how to do this on a ti-84 plus calculator. Could someone please help out?

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