You Are Standing in the Very Center of a Deep,flat-Bottomed

question 53

Multiple Choice

You are standing in the very center of a deep,flat-bottomed valley,and shout "Hello!" If the speed of sound is 343 m/s,and you hear the second echo "Hello!" at 2.1 seconds after you shout,how wide is the valley?

• A)360 m
• B)180 m
• C)720 m
• D)540 m

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Definitions:

Required Reserve Ratio

The fraction of deposits that banks are mandated by the central bank to keep on hand as reserves, rather than loaning out.

Total Reserves

The sum of a bank's deposits held at the central bank and the cash held in vaults.

Checkable Deposits

Refers to deposits in bank accounts from which individuals can write checks or use debit cards to make purchases directly.

Required Reserves

The minimum amount of funds that a bank must hold in reserve against deposits, as mandated by central banking regulations.