A depreciation of the U. S. dollar makes American goods cheaper relative to foreign goods, resulting in a in net exports in the U. S. and a shift of the IS curve in the U. S., everything else held constant. rise; rightward rise, leftward fall; leftward fall; rightward

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?