10 years makes up one decade, hope this helps!
        
             
        
        
        
a) We have that the discount is 65 % 
Scott buys a jacket for $150
First, we will calculate the discount

then we need to subtract the quantity calculated above from the original price

After the markdown Scott paid $52.5
b.
In order to know the taxes first, we need to calculate the 5% of $52.5

then we will sum the 5% plus the price after the markdown

The total cost of the jacket is $55.125
 
        
             
        
        
        
Sure I can help to the best of my ability if possible . Only on mathematics
        
             
        
        
        
The volume would be 201.06
        
                    
             
        
        
        
So the side length became 0.6*5  = 3 cm.