For the following questions answer them individually
For the total cost function $$C = 1000 + 120x + 14x^{2} + x^{3}$$ find marginal cost function.
If the value of standard deviation is 3 and that of arithmetic mean is 9 then find the value of coefficient of variation :
For an economy, the marginal propensity to consume is $$\frac{3}{4}$$ and the marginal tax rate is $$\frac{1}{9}$$, then value of multiplier is
If one of the regression coefficients value is greater than 1, then the value of the second regression coefficient must be -
Consumption : C = 1000 + 0.84
: I = 50
The output produced by the economy is 800. The level of unplanned inventories is