Which statement shows that the set of irrational numbers is not closed under multiplication? 1/7(square root of 7) equals square root of 7/7

square root of 5 time square root of 2 equals square root of 10

square root of 3 times 3 equals 3 square root of 3

square root of 2 times square root of 2 equals square root of 4

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.

Ineed to know the answer to this algebra question.

At 6 1/2 cents per pound of string beans how much does 7 pounds cost