Oak wilt is a fungal disease that infects oak trees. Scientists have discovered that a single tree in a small forest is infected with oak wilt. They determined that they can use this exponential model to predict the number of trees in the forest that will be infected after t years. f(t) = e exp 0.4t Graph the function.

The scientists believe the forest will be seriously damaged when 21 or more of the forests 200 oak trees are infected by oat wilt. According to their model how many years will it take for 21 trees to become infected?

Rewrit the exponential model as a logarithmic model that calculates the number of years g(x) for the number of infected trees to reach a value of x