Bananas and apples are substitutes. When the price of bananas falls and a technological advancement in apple production occurs at the same time: A the equilibrium price of apples rises and the equilibrium quantity of apples falls. B the equilibrium price of apples rises and the equilibrium quantity of apples rises. C the equilibrium price of apples rises and the equilibrium quantity of apples might rise or fall. D the equilibrium price of apples falls and the equilibrium quantity of apples might rise or fall.

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say it in english maybe we can

a manufacturer of printed circuit boards uses exponential smoothing with trend to forecast monthly demand of its product. at the end of december, the company wishes to forecast sales for january. the estimate of trend through november has been 200 additional boards sold per month. average sales have been around 1000 units per month. the demand for december was 1100 units. the company uses α = 0.20 and β = 0.10. make a forecast including trend for the month of january.

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