Determine whether −2a3b3+15c38z3 is a monomial, binomial, trinomial, or other polynomial

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.

For how answer my question this will be the last question can you answer in math subject

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents