If the balance at the end of eight years on an investment of $230 that has been invested at a rate of 3% is $285.20, how much was the interest?

Its due ! write an equation in which the quadratic expression 2x^2-2x 12 equals 0. show the expression in factored form and explain what your solutions mean for the equation. show your work.

Ametal rod is 2/5 meters long. it will be cut into pieces that are each 1/30 meters long. how many pieces will be made from the rod?

The area of a circle is equal to 1 dm². find the radius of the circle.