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According to a marketing website, adults in a certain country average 48 minutes per day on mobile devices this year

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January 11th, 2018

According to a marketing website, adults in a certain country average 48 minutes per day on mobile devices this year. Assume that minutes per day on mobile devices follow the normal distribution and has a standard deviation of 9 minutes. Complete parts a through d below.a. What is the probability that the amount of time spent today on mobile devices by an adult is less than 56 minutes?b. What is the probability that the amount of time spent today on mobile devices by an adult is more than 56minutes?c. What is the probability that the amount of time spent today on mobile devices by an adult is between46 and 58 minutes?d. What amount of time spent today on mobile devices by an adult represents the 85th percentile?An amount of time of nothing minutes represents the 85th percentile.

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