The percentage, P, of U.S. voters who use punch cards or
Chapter 9, Problem 9.1.57(choose chapter or problem)
The percentage, P, of U.S. voters who use punch cards or lever machines in national elections can be modeled by the formula P 2.5x 63.1, where x is the number of years after 1994. In which years were fewer than 38.1% of U.S. voters using punch cards or lever machines?
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