Sandra orders two trucks of water for her pool. The first truck begins filling the pool at a rate of 60 gallons per minute. The second truck arrives 35 minutes later and starts filling the pool at a rate of 80 gallons per minute. Sandra's pool holds 4,200 gallons of water. The equation 60+80(−35)=4,200 models this situation. How many minutes, m, will it take for both trucks to fill Sandra's pool?

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?

Alex measured the length of an item to be 3.7 cm. the actual length is 3.5 cm. what is alex’s percent error?

The probability that a tutor will see 0, 1, 2, 3, or 4 students is given below determine the probability distribution's missing value.