Ian's house and land have a market price of $225,000 and an assessed value of 55% of that amount. His state has a property tax rate of 0.088. How much does Ian pay in property tax every year?

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?