This is a linear function. Let diameter (inches) be x, circumference (inches) be y, observe that the value of y/x is always 3.14. For example, 15.7/5=31.4/10=...=3.14. Therefore, this is not only a function (one to one correspondence from x to y), it's also a linear function that can be represented as y=3.14x. 
        
             
        
        
        
It’s either b, c, or d. but i could be wrong
        
                    
             
        
        
        
The answer is z^3(9-28x^2)/4x
        
             
        
        
        
X= -11 and x=17 are the answers
        
                    
             
        
        
        
Answer:
£13,268.34
Step-by-step explanation:
16.5% of £15890.23
= 16.5/100 × £15890.23
= 0.165 × £15890.23
= £2,621.88795
Therefore,
£15890.23 - £2,621.88795
= £13,268.34205
Approximate to 2 decimal place
= £13,268.34