Part 1 : 
if the number of hours (h) is greater than 7.
Equation for the amount(A) in dollar is 
Amount (A) = 210 + (h-7)x20
Part 2 :
if she earns 410,
with the same equation
410 = 210 + (h-7)x 20
200 =(h-7)x 20
10 = h-7
17 = h
therefore, number of hours tutored is 17.
        
             
        
        
        
6 and 2/8 is correct hope this helps.
        
                    
             
        
        
        
1/2. 50 pennies equals $0.50
        
                    
             
        
        
        
If 500 miles is represented by 7.5 inches:
Divide 500 by 7.5 
500/7.5 = 66.666
Multiply this by 3.3
66.666*3.3 = 220
The answer is 220 miles