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a person invests $4000 in stocks today, and their value doubles every 6 years. let f (t) be the value (in dollars) of the investment at t years from now.
a. find an equation of f.
b. find the value of the investment 20 years from now.
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a. fcan be modeled by the exponential equation of the form f(t)= ab' with the following values of a and b.
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b= || (type an integer or decimal rounded to four decimal places as needed.)
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