Answer:
i belive 11 and 1 sorry if it is not right
Step-by-step explanation:
 
        
             
        
        
        
First subtract  2 revolutions from the - 840 :-    (- (840-720)  = -120
This gives  sin -120  which is in the 3rd quadrant of the unit circle
sin -120  =  - sin 60  = - sqrt3/2
        
             
        
        
        
The confidence interval formula is computed by:
Xbar ± Z s/ sqrt (n)
Where:
Xbar is the mean
Z is the z value
S is the standard deviation
N is the number of samples
 
So our given are:
90% confidence interval with a z value of 1.645
Sample size 40, 45
Mean 180, 179
Standard deviation 2, 4
 
So plugging that information in the data will give us a
confidence interval:
For 1:
Xbar ± Z s/ sqrt (n)
= 180 ± 1.645 (2 / sqrt (40))
= 180 ± 1.645 (0.316227766)
= 180 ± 0.520194675
= 179.48, 180.52
For 2:
Xbar ± Z s/ sqrt (n)
= 179 ± 1.645 (4 / sqrt (45))
<span>= 179 ± 1.645 (0.596284794)</span>
therefore, the answer is letter b
 
        
             
        
        
        
Answer:
One Solution: x = 4
Step-by-step explanation:
Step 1:
3x = 2x + 4            Equation
Step 2:
3x - 2x = 4        Subtract 2x on both sides
Answer:
x = 4
Hope This Helps :)
 
        
             
        
        
        
Answer:
2
Step-by-step explanation: