Find, correct to the nearest degree, the angle between the planes.Select the correct Answer 
Definitions:
Backed by Gold
Historically, refers to currencies that were directly convertible into a specified amount of gold, under the gold standard.
Precautionary Motive
The desire to hold liquid assets as a safeguard against unforeseen emergencies or as a precaution against future financial uncertainties.
Speculative Motive
The intent to hold cash or assets in anticipation of future price changes to make a profit.
Money Supply
The aggregate money supply in an economy at a particular time, covering cash, coins, and deposits in checking and savings accounts.
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