Find the circumference of a circle with radius, r =20.5m. Give your answer in terms of pi

What is (28 + 7 + 6 + 3) x 1/2 show your work

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?

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?