A paint mixture containing 25.0% of a pigment and the balance binders (which help the pigment stick to the surface) and solvents (which ensure that the paint stays in liquid form) sells for $18.00/kg, and a mixture containing 12.0% sells for $10.00/kg. 

(a) If a paint retailer produces a blend containing 17.0% pigment, for how much ($/kg) should it be sold to yield a 10% profit? 

(b) Paint manufacturers have begun to market “low VOC” paint as a more environmentally friendly product. What are VOCs? List some ways in which paint products can be altered to lower the VOC content.