The answer is 5.1 when you enter it into a calculator :)
        
             
        
        
        
Estimation: about 6,000 (90x70=6300)
Answer (product): 6256
        
                    
             
        
        
        
Non-linear
The line should be an exponential function, as it halves in mass every time a certain amount of time has passed.
        
             
        
        
        
Answer:
$7.20
Step-by-step explanation:
First, we would have to find out how much to subtract from $62.
We need to multiply 90% and 62 or 0.9 x 62
When we finish this equation we get 54.8, which is what we need to subtract from 62 to see what 90% off is.
62 - 54.8 = 7.2, so therefore our answer is $7.20