What expression is 16 times as large as 18,233- 4,006

When turned about its axis of rotation, which shape could have created this three-dimensional object?

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.

Acircle has a circumference of 28.36 units what is the diameter of the circle