Answer:
80
Step-by-step explanation:
360 - (110+80+90) = 80
I think b.3 i am not sure but it should be b
Answer:
j = 10
Step-by-step explanation:
You add 7 to both sides then divide both sides by -2
A is located, as you look A is past -2 almost hitting -3 making the mark 2.8 so the answer is A
Answer: C. 12.5
Step-by-step explanation:
Given : A manufacturer of new light bulbs claims the average lifetime of its long-life bulb is more than 4000 hours.
Population mean : 
Sample size : n= 100
Sample mean : 
Standard deviation: 
The value of test-statistic is given by :-

Hence, the value of the test statistic for this problem is 12.5.