You decide to go to dinner with three friends. before the check comes, the group decides to split the check evenly. the total check is $134.50. as a group you decide to tip the waiter 15% on top of the total check amount. how much money should each friend pay, including tip? round your answer to the nearest cent.

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?