Let Bstd be the number of US $20 bills in circulation at time t. The table gives values
Chapter 2, Problem 51(choose chapter or problem)
Let Bstd be the number of US $20 bills in circulation at time t. The table gives values of this function from 1990 to 2010, as of December 31, in billions. Interpret and estimate the value of B9s2000d.
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