In flying the 82 miles from Champaign to Peoria, a student pilot sets a heading that is 8° off course and maintains an average speed of 84 miles per hour. After 15 minutes, the instructor notices the course error and tells the student to correct his heading. Through what angle will the plane move to correct the heading and how many miles away is Peoria when the plane turns? A. 169.3°; 73.89 mi
B. 10.7°; 61.27 mi
C. 169.3°; 61.27 mi
D. 10.7°; 73.89 mi

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?