11. Find the sum of the finite geometric sequence whose arbit first term is 0.4, whose ratio is 0.5, and which has five
terms.
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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

The longer leg of a 30-60-90 trangle is 18

What is the value of the product (3-2i)(3+2i)?