SOLUTION: a. State sales tax S is directly proportional to retail price p . An item that sells for 180 dollars has a sales tax of 10.22 dollars. Find a mathematical model that gives the amou

Question 1170953: a. State sales tax S is directly proportional to retail price p . An item that sells for 180 dollars has a sales tax of 10.22 dollars. Find a mathematical model that gives the amount of sales tax S in terms of the retail price p .
Function:S(p)=
b. What is the sales tax on a 350 dollars purchase. Round to the nearest cent.
The sales tax on a 350 dollar purchase is $
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
S(p)=k*p
10.22=180*k
k=0.0568
S(p)=0.0568*p after rounding
-
350*0.0568=$19.87

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