75%
30/40 means its 75% out of 100% 
75$ representing the 30 and the 100$ representing the 40
 
        
                    
             
        
        
        
Answer:
B
Step-by-step explanation:
 
        
                    
             
        
        
        
ok I have no Idea just wanted to tell you your killua profile pic is cute
 
        
             
        
        
        
Answer:
Slope = 0.06
Step-by-step explanation:
From the question, we are not asked what to calculate but we can as welll look for the slope of the relationship.
Slope in this scenario will be the rate of change in price of milk with respect to time.
Slope = ∆P/∆t
The standard equation will be expressed as P = mt+c where
m is the slope
t is time 
P is the price of milk.
Comparing this with the given model
P(t)=0.06t+2.52
On comparison, we can see that;
m = 0.06
Hence the slope of the expression is 0.06