The short-run aggregate supply curve will decrease if:

A. the aggregate price level falls. commodity prices rise.

B. government tax revenues fall.

C. the aggregate price level falls, commodity prices rise, or if government tax revenues fall.

When a company produces and sells x thousand units per week, its total weekly profit is p thousand dollars, where upper p equals startfraction 800 x over 100 plus x squared endfraction . the production level at t weeks from the present is x equals 4 plus 2 t. find the marginal profit, startfraction dp over dx endfraction and the time rate of change of profit, startfraction dp over dt endfraction . how fast (with respect of time) are profits changing when tequals8?