Ex6-41 Croissant Bakery Inc. offers special decorated cakes for birthadays, wedding, and other occasions. It also has regular cakes available in its bakery. The following table gives the total number of cakes sold per day and corresponding probability. Compute the mean, variance, and standard deviation of the number of cakes sold per day. Xi Pi 12 0.4 13 0.25 14 0.25 15 0.1

Alaser tag arena sells two types of memberships. one package costs $325 for one year of membership with an unlimited number of visits. the second package has $125 enrollment fee, includes five free visits, and costs and additional $8 per visit after the first five. how many visits would a person need to use for each type of membership to cost the same amount over a one-year period?

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Earth's atmosphere is unique among the planets and is able to support life because it contains a large amount of a) oxygen b) helium c) methane d) carbon dioxide