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September 2, 2014

September 2, 2014

Posted by **Chevy** on Tuesday, November 1, 2011 at 6:53am.

Purchase price $15,375

After t years of ownership:

Age of car: Value:

0 15,375

4 7,687.50

8 3,843.75

If P is price after t years, Which would be a good model for the values above?

a) P(t) = 15,375 (2)^t

b) P(t) = 15,375 (1/2)^t

c) P(t) = 15,375 (1/2)^t/4

d) P(t) = 15,375 (2)^t/4

- math -
**Reiny**, Tuesday, November 1, 2011 at 9:03amThe general formula for a "half-life" problem is

Value = original(1/2) ^(t/k) , where k is the half-life period.

so what do you think?

- math -
**chevy**, Tuesday, November 1, 2011 at 4:46pmI think C

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