A floor refinishing company charges 1.91 per square foot

Question

A floor refinishing company charges $1.91 per square foot to strip and refinish a tile floor for up to 1000 square feet. There is an additional charge of $400 for toxic waste disposal for any job which includes more than 150 square feet of tile.
(a) Find an equation for the amount C (in dollars) they will charge to refinish a floor which is x square feet when x≤150.
C(x)= $
help (formulas)

(b) Find an equation for the amount C (in dollars) they will charge to refinish a floor which is x square feet when x>150.

Answer 1

C(x)= $

If x≤150,

C(x) = (1.91/1000)x

 

If x>150, then

C(x) = (1.91/1000)x + 400