A manufacturer determines that the profit derived from selling x units of a certain item is given

by: P = − 2x^2 +800x Find the marginal profit for a production of 20 units.

Also,

The demand function for a particular commodity is given by: p = 400− 4x . Find the
marginal revenue when x = 20.

1 answer

These are arithmetic questions
Just plug the given values into the equations.

P = -2(20^2) + 800(2) = .....