Simplification of the expression (xyz2)4.

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?

How to do this , and can some one explain

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?