Other answer is 148 degrees but I need help

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

An angle that measures between 90 and 180° is called a(,

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?