5. * . Differentiate, expressing each answer using positive exponents. a) y= (4x + 1)2 b) y = (3x2 - 2)3 dy= (x3 -x)-3 d) y= (4x2 + 3x)-2 6. Differentiate. a) V= -x+3 4x + 1 b) y = - 2.x2 + 5 x3 - 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