Answer:
see the explanation
Step-by-step explanation:
Let
B ---> the balance of money saved.
M ---> the amount invested in dollars
we have
<em>JoeNah's Equation</em>

For M=$100
substitute in the equation

<em>Dekobian's Equation</em>

For M=$100
substitute in the equation

<em>Evan's Equation</em>

For M=$100
substitute in the equation

In this problem
Dekobian's Equation and Evan's Equation are correct