Answer:
Mean = 0.38082 checks per day
Variance = 0.38082
Standard deviation = 0.61711
Step-by-step explanation:
In a Poisson distribution, the variance (V) is equal to the mean value (μ), and the standard deviation (σ) is the square root of the variance.
A year has 365 days,, if 139 checks were written during a year, the mean number of checks written per day is:

Therefore, the variance and standard deviation are, respectively:

It is D, as 2 plus 3 is 5 which is half of 10.
Answer:
<h2>
If two angles measures 180 degrees, then they form a linear pair.</h2>
Step-by-step explanation:
The conditional statement should be this way, because after the word ''if'', should be placed the condition, and after the word ''then'', should be the consequence.
Answer:
Option D y=-3x^2 +4
Step-by-step explanation:
This is the correct answer because the graph is going down which shows that it is negative and the y intersect is +4
She sailed for 7 hours and she sailed 77 hours in all