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The duration t (in minutes) of customer service calls received by a certain company is...

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Algebra

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The duration t (in minutes) of customer service calls received by a certain company is given by the following probability density function. (Round your answers to four decimal places.)f(t) = 0.4e-0.4t t? 0(a) Find the probability that a call selected at random lasts 2 minutes or less.(b) Find the probability that a call selected at random lasts between 6 and 11 minutes.

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