The range is the difference between the lowest and the highest number.
the answer is 30.5
        
                    
             
        
        
        
To work out the profit, firstly, you have to work out the cost of buying them, which is $15 multiplied by 100, which is $1500. You then have to work out what he sold them all at, which is $29.99 multiplied by 100, which is $2999. You then have to subtract $1500 from $2999, giving you $1499. Therefore, Ace made $1499 in profit.
Hope this helps :)
        
                    
             
        
        
        
Step-by-step explanation:
complementary angles means that both of them together = 90
13y +12 + 20y + 12 = 90
add all y together and numbers together 
33y + 24 = 90
solve for y
33y= 66. y= 2
now let's get the measurements of the angles 
13(2) + 12= 38
20(2) + 12= 52