What is the difference between rational exponents and integer exponents? select one: a. there is no difference. b. rational exponents are whole numbers and integer exponents are fractional exponents. c. rational exponents are fractional exponents and integer exponents are whole numbers. d. integer exponents are always positive while rational exponents are negative and positive.

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?