While Jon is walking to school one morning, a helicopter flying overhead drops a $20 bill. Not knowing how to return it, Jon keeps the money and deposits it in his bank. (No one in this economy holds currency.) If the bank keeps 25 percent of its money in reserves:a. How much money can the bank initially lend out? b. After this initial transaction, by how much is the money in the economy changed? c. What's the money multiplier? d. How much money will eventually be created by the banking system from Jon's $20?

You are the manager of a large crude-oil refinery. as part of the refining process, a certain heat exchanger (operated at high temperatures and with abrasive material flowing through it) must be replaced every year. the replacement and downtime cost in the first year is $165 comma 000. this cost is expected to increase due to inflation at a rate of 7% per year for six years (i.e. until the eoy 7), at which time this particular heat exchanger will no longer be needed. if the company's cost of capital is 15% per year, how much could you afford to spend for a higher quality heat exchanger so that these annual replacement and downtime costs could be eliminated?