Looking for a friend :(

Which function has the same domain as y=2x

The amount of energy it takes to lift a box might be a function of which of the following

The classrooms are trying to raise $1,200.00 for charity. mrs. leblanc's class has raised 50%. mr. patel's class has raised $235.14 ms. warner's class has raised 1/3 as much as mrs. leblanc's class. how much more money is needed to reach the goal of $1,200.00?