The annual revenue earned by Wal-Mart in the fiscal years ending January 31, 1994 to January 31, 2002 can be approximated by 
billion dollars per year 
variablename="impvar_3097e51fefd44c62a3367efd2" /> where t is time in years (
represents January 31, 2000). Suppose that, from January 1999 on, Wal-Mart invested its revenue in an investment that depreciated continuously at a rate of 4% per year. What, to the nearest $10 billion, would the total value of Wal-Mart's revenues have been by the end of January 2002?
?
A. Total revenue ? 460 billion dollars
B. Total revenue ? 4,600 billion dollars
C. Total revenue ? 50 billion dollars
D. Total revenue ? 230 billion dollars
E. Total revenue ? 90 billion dollars
Answer: A
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