peroWendellcassymm peroWendellcassymm 04-01-2016 Mathematics contestada Which equation models this problem? Susan paid $36.90 for nine washcloths. What is the unit price, p, per washcloth? a. 36.90p = 9 b. p/9 = 36.90 c. p/36.90 = 9 d. 9p = 36.90