Answer:
She ordered 11 things 
Step-by-step explanation:
you should have added the cost of each item then I could have given you the whole answer
 
        
             
        
        
        
Answer:
Step-by-step explanation:
total cost = c
students = s
cost = 7
c = s*7
independent is  s
dependent is c
 
        
             
        
        
        
About 400 marbles. You simply set up a proportion and solve it as I did in the photo attached.
 
        
        
        
Answer:
   k = 1.2
Step-by-step explanation:
Solving for t when the account value is 30,000, we have ...
   30,000 = 25,000e^(0.0198t)
   30,000/25,000 = 1.2 = e^(0.0198t)
   ln(1.2) = 0.0198t
   t = ln(1.2)/0.0198
Matching this with the form ...
   t = ln(k)/0.0198
we see that k = 1.2.
_____
k is the multiplier of account value in time period t.
 
        
             
        
        
        
Hello, the closest to x is 6