If a firm produces 10 units, TC=$100 . When the firm increase its output to 15 units, TC= $150 . The firm's variable costs equal to

If the demand curve for bottled water shifts leftward and the supply curve of bottled water shifts leftward, the equilibrium

A) price of bottled water definitely increases. B) price of bottled water definitely decreases. C) quantity of bottled water definitely increases. D) quantity of bottled water definitely decreases.

A decrease in demand and a decrease in supply, will lead to a(n) ________ in equilibrium quantity and a(n) ________ in equilibrium price.

A) decrease; indeterminate change B) indeterminate change; increase C) indeterminate change; decrease D) increase; indeterminate change