Kelly sees some fish at the pet shop . a man buys 2 fish .a boy buys 4 fish . now there are 3 fish . how many fish did kelly see at first?

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

If you are just building your payment history, how many points from a perfect score will you possibly miss?

Could someone with number 1 and 2