Respuesta :
It would take about 23.1 months for the plant population to be 138 plants.
Exponential Function
An exponential function is in the form:
y = abˣ
Where y,x are variables, a is the initial value of y and b is the multiplication factor.
Given:
[tex]P(m)=19.3(1.089)^m[/tex]
Where P is the plant population after m months.
For a population of 138 plants:
[tex]138=19.3(1.089)^m\\\\m*ln(1..089)=ln(7.15)\\\\m=23.1[/tex]
It would take about 23.1 months for the plant population to be 138 plants.
Find out more on Exponential Function at: https://brainly.com/question/12940982