6. Imagine that a farm manager's production function is given by: y=-0.00023x^3+0.0042x^2+0.75x Where x and y are the input and output, respectively. Calculate TPP, APP, MPP at x=25

5. Let the production function of Australian wool be defined by: f ( x ) = 4x^3 + 5/2 x^2 7x + 15 . Then which of the following best describes the first-order condition for profit maximization? (a) 3 x^2 + 2x 7 = 0 (b) 12x^2 + 5x 7 = 0 (c) x=1, or 2 (d) f(x) is increasing at an increasing rate

4. A neo-classical production usually has three regions: a) region 1 where it shows increasing returns (b) region 2 where it shows diminishing returns (c) region 3 where it shows negative returns