Mathematics, 10.02.2021 08:00 khaekhae10
Two girls and three boys are entered in a school raffle that has two prizes. If a person is not allowed to win both prizes, what is the probability that two girls win?
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Mathematics, 21.06.2019 18:30
The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truckββ$80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?
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Mathematics, 21.06.2019 19:50
Prove (a) cosh2(x) β sinh2(x) = 1 and (b) 1 β tanh 2(x) = sech 2(x). solution (a) cosh2(x) β sinh2(x) = ex + eβx 2 2 β 2 = e2x + 2 + eβ2x 4 β = 4 = . (b) we start with the identity proved in part (a): cosh2(x) β sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 β sinh2(x) cosh2(x) = 1 or 1 β tanh 2(x) = .
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Two girls and three boys are entered in a school raffle that has two prizes. If a person is not allo...
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