Answer: 0.9660
Step-by-step explanation:
Given: Mean : 
Variance : 
⇒ Standard deviation : 
The formula to calculate z is given by :-

For x= -3

The P Value =
For x= 3
The P Value =

Hence, the probability that a given error will be between -3 and 3=0.9660
Answer:
1) x≥6
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2) h > 20
Mark worked more than 20 hours.
Step-by-step explanation:
1) -20x+18≥-102
-20x≥-102-18
-20x≥-120
Dividing -20 both side
≥
x≥6
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2) 14h + 25 > 305
14h > 305-25
14h > 280
Dividing 14 both side

h > 20
Mark worked more than 20 hours.
Answer:
X=157.5
Step-by-step explanation:
Not sure this is correct but, what i did was 365-45=315/2=15.7
I dearly hopes this helps you out...
Blame it on my empty mindset I try to keep from losing the rest of me I worry that I wasted the best of me on you baby you don’t care