4k kids went outside the RSM to play during recess. They were asked to stand in pairs. How many pairs were there?

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry

Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?

Need so much on this one how many yards?