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jared is building a treehouse. he pays $75 for materials and pays his friend $12 per hour to him. if jared spends a total of $129 on building his tree house, for how many hours did his friend work on it?

Let f (x) = x e8x. find a formula for the nth derivative of f, where n is any positive integer. use x and n in your answer if needed. f (n)(x) =

Evaluate the following expression 1/3^2

Peter applied to an accounting firm and a consulting firm. he knows that 30% of similarly qualified applicants receive job offers from the accounting firm, while only 20% of similarly qualified applicants receive job offers from the consulting firm. assume that receiving an offer from one firm is independent of receiving an offer from the other. what is the probability that both firms offer peter a job?