Question 189515
You were given the function to be 2000 - 100p, where p represents the value in terms of money for each shirt.

Then the polynomial would be 

R(p) = 2000 - 100p

To find R(5), R(10) and R(20), replace x with each value individually and simplify the function.

I will find R(5) and you  can do the rest.  

Let p = 5.

R(5) = 2000 - 100(5)

R(5) = 2000 - 500

R(5) = 1500