Help 4/5 x 5/5 black means its right red means wrong

Select the number of ways in which a line and a circle can intersect

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?

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?