$12,800 at 12% for 3 years find the total amount ?

Why is it difficult to find length of the hypotenuse the same way the length of the legs can be found?

What is the square root of 45? (step by step working plz)

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?