The x-intercept is where the graph crosses the x-axis. that happens when y=0.
x + 2(0) = 5
x = 5
x-intercept is 5
The probability that the sample mean is less than 30 school days will be given as follows:
the z-score is given by:
z=(x-μ)/σ
where
μ- stand deviation
σ-mean
thus the z-score of our information is:
z=(30-28)/9
z=0.222222
hence the probability that the sample mean is less than 30 will be:
P(x<30)=0.5871~58.71%
21Step-by-step explanation:
The correct answer would be x=11 :)
