6. Differentiate. -x+3 4x + 1 a) y= 2x2 + 5 b) y = 7 3 - 2 7. A paint store sells 270 pails of paint per month at a price of $32 each. A customer survey indicates that for each $1.20 decrease in price, sales will increase by 6 pails of paint. a) Determine the demand, or price, function. b) Determine the revenue function. c) Determine the marginal revenue function.1. Determine the point(s) on the graph of y = x2 (x + 3) where the slope of the tangent is 24. 2. Simplify, and then differentiate. 10x4 - 6x3 a) f (x) = 2.x2 b) g(x) = (3x + 4)(2x - 1) 3. Use the product rule to differentiate each of the following functions. f(x) =(1-x)(x2-5) b(t ) = (12 + 3) (312 - 7)