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April 16, 2014

April 16, 2014

Posted by **alexis** on Tuesday, November 1, 2011 at 4:53pm.

f(0) = 200 and f(3) = 2000.

a) Use the form f(t) = Pe^rt to find the equation of this exponential function.

b) In the form f(x) = Pa^x, a is the growth factor. find the growth factor.

c)What input value gives an output value of 5,000?

- math - algebra -
**abiba**, Tuesday, November 1, 2011 at 6:50pmmr.jagodnishvil

- math - algebra -
**Steve**, Tuesday, November 1, 2011 at 11:57pm200 = Pe^0 = P

2000 = Pe^rt = 200e^3r

e^3r = 10

3r = ln 10

r = ln10/3 = 0.7675

f(x) = 200a^x = 200e^.7675x

a^x = e^.7675x

a = e^.7675 = 2.154

5000 = 2.154^x

ln 5000 = x ln 2.154

x = ln5000/ln2.154 = 11.1

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