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In Problem 22, find d so that the probability of a randomly selected laser pointer battery lasting d years or less is .5.
22. The shelf life (in years) of a laser pointer battery is a continuous random variable with probability density function
- (A) Find the probability that a randomly selected laser pointer battery has a shelf life of 3 years or less.
- (B) Find the probability that a randomly selected laser pointer battery has a shelf life of from 3 to 9 years.
- (C) Graph y = f(x) for [0, 10] and show the shaded region for part (A).
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