A bag contains 4 red marbles, 7 blue marbles, and 8 yellow marbles. Two marbles are selected, one at a time, without replacement.

Find the probability that the first marble is blue and the second marble is red.

Express your answer as a decimal, rounded to the nearest hundredth.

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?

What is the effect on the graph of the function f(x) = x2 when f(x) is changed to f(x) − 4?

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.