There are 60 fish in a gigantic tank at the New England Aquarium. 18 of them are sharks. What percent of the fish are sharks?

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

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.

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.