Answer:
The null hypothesis is: u >= 1300 KN/m^2
And the alternative hypothesis is: 
u < 1300 KN/m^2.
Step-by-step explanation:
The null hypothesis describes hat there is no difference or assiciation between variables of a specific population or that it is a particular average value while the alternative hypothesis states otherwise.
In this case study, the null hypothesis is: u >= 1300 KN/m^2
And the alternative hypothesis is: 
u < 1300 KN/m^2.
  
        
             
        
        
        
Answer:
    4.485 × 〖10〗^10  x    1.3268 × 〖10〗^11 = 
    (4.485 x1.3268) ×( 〖10〗^11× 〖10〗^10)
               5.950    x  〖10〗^21
Step-by-step explanation:
 
        
             
        
        
        
Step-by-step explanation:
your friend is closer to the school (b)
it's graph covers less area..
 
        
             
        
        
        
Yes he will 
Because math is cool