1.613 jus use a calculator
        
             
        
        
        
Answer : 70 
Step-by-step explanation: because  40 +30 and the biggest number in the chart  is 7 just add a 0 and it becomes 70 
 
        
             
        
        
        
11/12 + 1 3/4=
1 3/4 = 7/4 = 21/12
11/12 + 21/12 = 32/12 = 2 8/12 = 2 2/3 oz
 
        
                    
             
        
        
        
Answer:
1/30
Step-by-step explanation:
let, vanilla be the first ice cream.
hence, the probability of choosing vanila= 1/6
let, chocolate be the second ice cream.
hence, the probability of choosing chocolate=1/5
hence, the probability that the next customer's sundae will have vanilla and chocolate (in either order)= (1/6)×(1/5)
=1/30
 
        
             
        
        
        
f(x) increase by a factor of 3
Explanation:
         Given that f(x)= 3* and the interval is x=4 to x=57
         Now we put the value for x is 4 to 57 then value of f(x) increase with the multiply of 3.
         Because the x is multiplied with 3 i.e., 3*
         So f(x) increase by a factor of 3.
         If we put x=4, then f(x)= 12     (∵ 3×4=12)
         If we put x=5, the f(x)= 15       (∵ 3×5=15)
         If we put x=6,the f(x)= 18             (∵ 3×6=18)
similarly., values of x= 7,8,9,...155.
         Then,
         If we put x=56, the f(x)=168
         This process will continue until f(x)=171 for x=57.