Counter clockwise means it goes backwards so -90°
After the 90° counter clockwise rotation the coordinates are (4,-3)
 
        
        
        
Answer:
B
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Mean for a binomial distribution = 374
Standard deviation for a binomial distribution = 12.97
Step-by-step explanation:
We are given a binomial distribution with 680 trials and a probability of success of 0.55.
The above situation can be represented through Binomial distribution;

where, n = number of trials (samples) taken = 680 trials
             r = number of success  
            p = probability of success which in our question is 0.55
So, it means X <em>~ </em> 
 
<em><u>Now, we have to find the mean and standard deviation of the given binomial distribution.</u></em>
- Mean of Binomial Distribution is given by;
                     E(X) = n  p
 p 
        So, E(X) = 680  0.55 = 374
 0.55 = 374
- Standard deviation of Binomial Distribution is given by;
                    S.D.(X) =  
 
                                =  
 
                                =  = 12.97
 = 12.97 
Therefore, Mean and standard deviation for binomial distribution is 374 and 12.97 respectively.
 
        
             
        
        
        
Answer:
b/a
Step-by-step explanation:
Given,(b^-2)/a*(b^-3)
or,(b^-2+3)/a
or,b/a
 
        
                    
             
        
        
        
Answer:
2.
i) (c)
ii) (d)
iii) (b)
iv) (a)
3.
ii)  80°
Step-by-step explanation:
2.
i) 2x+x+3x=180°
x=30°
ii) x+110=180
x=70
iii) x+2x+30°=180
x=50°
iv) 2x+15°+45°+x=180
3x+60°=180
x=40°
3.
ii) 2x+5+25=180°
2x+30°=180°
x=75°
the measure:  x+5°= 75°+5°=80°