If a Tree's Value (V)is Growing According to the Equation $v ( t ) = e ^ { . i t - .0025 s t }$

Multiple Choice

If a tree's value (v) is growing according to the equation $v ( t ) = e ^ { . i t - .0025 s t }$ with an interest rate of 5 percent,the tree should be harvested when t =

A) 5 years.
B) 10 years.
C) 25 years.
D) 100 years.