U.S. Postal Service first-class mail volume was 91.7 billion pieces in 2008, and it decreased by about
Question:
a. Complete Table 39 to help find an expression that stands for the U.S. Postal Service first-class mail volume (in billions of pieces) in the year that is t years since 2008. Show the arithmetic to help you see a pattern.
b. Evaluate the expression that you found in part (a) for t = 5. What does your result mean in this situation?
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