Mathematics, 25.11.2019 05:31 Bigbabybrudis
The country a consumer price index is approximated by the following formula, where t represents the number of years after 1990.
a(t)=100e^0.023t
for instance, since a(16) is about 144, the amount of goods that could be purchased for $100 in 1990 cost about $144 in 2006. use the function to determine the year during which costs will be 90% higher than in 1990.
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