The value of x for the exponential function f(x) = e^x is a set of real numbers?true or false

Create a real-life situation and create a system and show how it might be modeled algebraically with a system of equations (or inequalities) show all work include a few sentences explaining the situation, your variables of choice and what each represents, and how you would set it up and solve it algebraically. !

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8