Answer 2 a-e

gradebelow the 60th percentile of this distr CUIES, and an F grade the 60th percentile of this distribu- o all sCoeach possible letter grade, find the lowest to all tion. s table score within the established ran accepthe lowest acceptable score for an A is the k mac chem type an a cal esuant the 90th percentile of thi at the 90th percentile of this core normal distribution. t is known that the distribution of purchase 2 Suppose it is known customers entering a popular retail store amounts by custo is approximately normal with me deviation $20. What is the probability that a randomly selected customer spends less than $85 at this store? b. What is the probability that a randomly selected customer spends between $65 and $85 at this store