(a) starting with the geometric series ∞ xn n = 0 , find the sum of the series ∞ nxn − 1 n = 1 , |x| < 1.

Find the balance at the end of 4 years if 1000 is deposited at the rate of

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The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.