On the unit cirlce, the cosine of an angle is negative whenever the angle falls in the interval
If you recall your special triangles, this cosine occurs for angles of
More generally, this occurs for
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1 answer:
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On the unit cirlce, the cosine of an angle is negative whenever the angle falls in the interval
If you recall your special triangles, this cosine occurs for angles of
More generally, this occurs for
Answer:
0.0498 = 4.98%
Step-by-step explanation:
In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:
In which
x is the number of sucesses
e = 2.71828 is the Euler number
is the mean in the given time interval.
Inquiries arrive at a record message device according to a Poisson process of rate 15 inquiries per minute.
Each minute has 60 seconds.
So a rate of 1 inquire each 4 seconds.
The probability that it takes more than 12 seconds for the first inquiry to arrive is approximately
Mean of 1 inquire each 4 seconds, so for 12 seconds
This probability is P(X = 0).