The equation MFR\" = 3- Elli-atlas): Q is the capital arbitrage equation. (3 All otthese answers are correct. (3 states that ifthe real interest rate is zero, arbitrage equation states the marginal product of capital is equal to minus the capital gain. (9) states that if a rm has \"too much" capital, it should divest of some of its capital stock. (3 states that a rm should invest in new capital until the marginal product of capital is equal to the difference between the real interest rate and the growth rate of the price of capital