I need help with this one

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?

Which representation has a constant of variation of -2.5

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15