# A country's savings S is defined implicitly in terms of its national income l by the...

A country's savings S is defined implicitly in terms of its national income l by the equation 52 +212= = SI + 1 where both S and I are in billions of dollars. Find the marginal propensity to consume when I = 20 and S = 14. The marginal propensity to consume when I = 20 and S = 14 is (Simplify your answer.) Someone plans to buy 50 shares of computer stock, 350 shares of oil stock, and shares of automobile stock. The computer stock is selling for 63 dollars a share, oil stock is selling for 37 dollars a share, and automobile stock is selling for 14 dollars a share. Use matrix multiplication to calculate the total cost of the purchases. The total cost of the purchases is \$ Kindly anser them. Thanks

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