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The heights of pecan trees are normally distributed with a mean of 10 feet and a standard deviation of 2 feet. 13. Show all work.

The heights of pecan trees are normally distributed with a mean of 10 feet and a standard deviation of 2 feet. 13.

Show all work. Just the answer, without supporting work, will receive no credit.

(a) What is the probability that a randomly selected pecan tree is between 9 and 12 feet tall? (Round the answer to 4 decimal places)

(b) Find the 75th percentile of the pecan tree height distribution. (Round the answer to 2 decimal places)

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