Posted by **Alec** on Thursday, July 19, 2012 at 10:17pm.

The length (in centimeters) of a typical Pacific halibut t years old is approximately

f(t) = 210(1 − 0.94e^−0.2t).

(a) What is the length of a typical 9-year-old Pacific halibut?

cm

(b) How fast is the length of a typical 9-year-old Pacific halibut increasing?

cm/yr

(c) What is the maximum length a typical Pacific halibut can attain?

cm

- Calc -
**Reiny**, Thursday, July 19, 2012 at 10:30pm
a) plug in t=9

b) take the derivative

c) as t gets larger, e^-.2t gets smaller

so .94e^-.2t gets smaller

so you are left with

f(t) = 210(1 - 0) = 210

- Calc -
**Alec**, Thursday, July 19, 2012 at 10:37pm
b) Take derivative and plug in 9?

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