A study was conducted of doctors and their opinions of a particular brand of painkiller. Of these doctors, 68% indicated a preference for this brand. The study was composed of 120 doctors. (a) (2 pts) How many doctors said they preferred the particular brand of painkiller?

1. what are the missing reasons in the proof 2. it's in the second picture and 3

Awater tank holds 18000 gallons. how long will it take for the water level to reach 6000 gallons if the water is used at anaverage rate of 450 gallons per day

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?