Question: In an experiment designed to test short-term memory,* L. R. Peterson and M. J. Peterson found that the probability p(t) of a subject recalling a

In an experiment designed to test short-term memory,* L. R. Peterson and M. J. Peterson found that the probability p(t) of a subject recalling a pattern of numbers and letters t seconds after being given the pattern is

a. What is the probability that the subject can recall the pattern immediately (t = 0)?

b. How much time passes before p(t) drops to 0.5?

c. Sketch the graph of p(t).

p(t) = 0.89[0.01 +0.99(0.85)']

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