Researchers have shown that the number of successive dry days that occur after a rainstorm for...

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Researchers have shown that the number of successive dry days that occur after a rainstorm for a particular region is a random variable that is distributed exponentially with a mean of 9 days Complete parts (a) and (b) a. What is the probability that 13 or more successive dry days occur after a rainstorm? (Round to four decimal places as needed.) b. What is the probability that fewer than 3 dry days occur after a rainstorm? (Round to four decimal places as needed) Researchers have shown that the number of successive dry days that occur after a rainstorm for a particular region is a random variable that is distributed exponentially with a mean of 9 days Complete parts (a) and (b) a. What is the probability that 13 or more successive dry days occur after a rainstorm? (Round to four decimal places as needed.) b. What is the probability that fewer than 3 dry days occur after a rainstorm? (Round to four decimal places as needed)