The nth term of the sequence is an^2 + bn + c
1 11 27 49
find value of c

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319

Which of the following circles have their centers on the x-axis? check all that apply.

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?