Answer:
Step-by-step explanation:
Answer:
a)
b)
c)
Step-by-step explanation:
For this case we know that the mean for the random variable of interest is and the variance so then the deviation would be
The z score is given by thsi formula:
Part a
We want this probability:
And if we find the z score we got:
And we can find this probability:
Part b
We want this probability:
And if we find the z score we got:
And we can find this probability:
Part c
We want this probability:
And if we find the z score we got:
And we can find this probability:
Step-by-step explanation:
So first we calculate the weekly hours:
23.80 x 34 = 809.20
Then we calculate the time and half:
23.80 x 6 x 1.5 = 214.2
Then we total then together:
214.2 + 809.20 = 1023.40
Solve for x:
4x-9 >= -21
Add 9 to both sides:
4x >= -12
Divide both sides by 4:
X >= -3
The number line would have a solid dot on -3 with a line and arrow pointing to the right of -3