It cant be 7 because,
X-7>3
7-7>3
0>3
And 0 is not bigger than 3 
It cant be 9 because,
X-7>3
9-7>3
2>3
And 2 is not bigger than 3
So it is 11 because,
X-7>3
11-7>3
4>3
And 4 is bigger than 3
So the answer is 3) 11
        
             
        
        
        
Answer:
For each US dollar she gets 1.1 AUS dollars
Step-by-step explanation:
350US for 385AUS
350:385 divide by 350
1 : 1.1
 
        
             
        
        
        
Step-by-step explanation:
V=pi r^2h
V=3.14x3^2x7
=197.82