Find the value of given expression

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The random variable x represents the number of phone calls an author receives in a day, and it has a poisson distribution with a mean of 8.7 calls. what are the possible values of x

Elizabeth is using a sample to study american alligators. she plots the lengths of their tails against their total lengths to find the relationship between the two attributes. which point is an outlier in this data set?

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.