Suppose first main bank, second main bank, and third main bank all hold zero excess reserves. the required reserve ratio is 20%. suppose that the federal reserve buys a government bond worth $1,500,000 from jack, a client of first main bank. he immediately deposits the money into his checking account at first main bank. as a result of this transaction, the required reserves for first main bank will increase by $ and its excess reserves will increase by $ .

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?