The circumference of a circle is 12.56 cm. what is the area? use 3.14 for pi

Abouncy ball is released from a certain height. on the first bounce, it travels 32cm. with each subsequent bounce, it travels 9/10 the distance of the previous bounce. what is the total distance that the ball has traveled when it completes its 25th bounce?

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12