Answer:
5 hours
Step-by-step explanation:
31-11 = 20
20/4 = 5
 
        
             
        
        
        
Answer: 252 in
Step-by-step explanation:
 
        
             
        
        
        
Answer:
 40320 different ways
Step-by-step explanation:
That problem is a permutation one
We have eight people to occupy  one position in a team, without any constraint at all
So 
Total number of events   = P(8)
P (8)  =  8!
P (8)  =  8*7*6*5*4*3*2*1
P (8)  =  40320 different ways
 
        
             
        
        
        
Answer: half a inch is 1.27 centimeters 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
7.88 x 10^5 is 788,000 is scientific notation