xandraeden32
28.07.2019 •
Mathematics
The value of a $1200 computer decreases 2.7% annually. a. write an equation that gives the price(y) of the computer in x years. b. what will the value of the computer be after 3 years?
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Ответ:
The computer will be worth $1105.40 after 3 years.
Exponential equations are written in the form y=abˣ, where b=1+r (rate of increase or decrease as a decimal number) and a is the initial amount. The initial amount of the computer is 1200, and the rate of decrease is 2.7, so -0.027. Putting 3 in for the exponent (number of years) we get:
y=1200(0.973)³=1105.40.
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