Can someone plz help me plz...

Step-by-step explanation:

so basically make a system of equations using what's given and solve.

Understand that the equation is the same as  

First: make two points to plug in

(0, 150) and (1, 450)

Therefore x (or t) is the time in months

and y (or N) is the number of lilies

Second: Plug in to make system

Third: solve

let's start with the fist equation

first simplify: b to the zero power is just 1

Now plug in 150 to the a in the other equation

solve for b

simplify:

b=3

now you're done

equation: