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14111cwir11ws.7

# 14111cwir11ws.7 - 034 Find E X V ar X σ median and mode 31...

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28. It is determined that the weight and length of a particular animal have a linear relationship. If the animal is 3 inches in length, they will weigh 1 ounce. If the animal is 12 inches in length, they will weigh 5 ounces. Find the linear model and use it to predict the weight of an animal that is 21 inches in length. 29. Valerie decides to put \$30 into an account every week. If the account earns 3 . 45%/year compounded weekly, how much will she have in the account 15 years from now? 30. Given the following probability distribution: x - 15 - 5 20 30 P ( X = x ) 0 . 056 0 . 72 0 . 19
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Unformatted text preview: . 034 Find E ( X ), V ar ( X ), σ , median, and mode. 31. Given S = { 2 , 4 , 6 , 8 , 10 , 12 } , A = { 2 , 6 , 12 } , B = { 8 , 10 , 12 } , C = { 2 , 4 , 6 , 8 , 10 } , ﬁnd the following: (a) A c ∩ B (b) A ∪ ( B ∩ C ) c (c) B ∩ ( A ∩ C ) 32. An account pays continously compounded interest at the rate of 3 . 6% per year. If the account has \$4,500 in it after eight years, how much money was originally placed in the account? 33. If n ( A ∪ B ) = 80, n ( A ) = 30, and n ( B ) = 75, what is n ( A ∩ B c )? 7...
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