To take an Uber, it costs $4.00 plus an additional $1.50 per mile traveled. You spent $28.00 on an Uber, which includes the $3.00 tip left. How many
miles did you travel? *

Can someone me and do the problem plz so i can understand it more better

Me n o w. i need t h i s. 10 points

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?