The ratio of concrete to water to sand is 1: 2: 3. what fraction of the mix is water?

Adiverr from the university of florida women’s swimming and diving team is competing in the ncaa zone b championships

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?

Interpret the following expression (5y^2-7)^3/(2y)^2