Answer:
the correct symbol is: Δ
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
sorry I can only answer no.3

 
        
             
        
        
        
Answer:. This would be 0.81^20 for none of the 19=0.0148
Step-by-step explanation:With a tree diagram, there are two possibilities, one is ND from 1 D from 2, with probability (5/8)(2/5)=(1/4) and the other is (3/8)(3/5)=9/40 That would be 19/40 for the answer.
3. Poisson parameter lambda=5
for P(0), it is e^(-5)(5^0)/0! or e^(-5)=0.0067
  
for P(1), it is e^(-5)(5^1)/1! or 5e(-5)
The total probability is 6e^-5 or 0.0404
4. the mean is 1000 hours, so lambda is the reciprocal or 1/1000
the probability it will last <800 hours is 1-e^(-800*1/1000) or 1-e^(-.8)=0.5507
5. assume p=0.4 since it ca't be 4
sd is sqrt (np*(1-p))=sqrt (6*0.6=sqrt(3.6)=1.90
 
        
             
        
        
        
Answer:
5
Step-by-step explanation:
 
        
             
        
        
        
 
4 sq.units
 
area of a rectangle = length × breadth
length = 4units
breadth = 1units 
A = l × b
 = 4 × 1
 = 4 sq.units
<h3>
<em>HOPE</em><em> </em><em>IT</em><em> </em><em>HELPS</em><em> </em><em>U</em><em> </em></h3>
<em>IF</em><em> </em><em>YES</em><em> </em>
<em>MARK</em><em> </em><em>ME</em><em> </em><em>AS</em><em> </em><em>THE</em><em> </em><em>BRAINLIEST</em>