Use the best-fitting exponential model to determine the answer to each question. (For problems using calendar years, “reset the clock” so that t = 0 in the year for which you first have data.)
Exercise
As cassette tapes and compact discs became more popular, the sales of vinyl singles declined according to the accompanying table.
Year t | 1988 | 1989 | 1992 | 1994 | 1996 |
Millions of units s | 65.6 | 36.6 | 19.8 | 11.7 | 10.1 |
Source: The World Almanac and Book o f Facts 1998.
Suppose that vinyl singles will be discontinued when their sales fall below 2 million. In what year will this occur?
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