The water level in a vat changed by −9.9inches in 2.25 hours as the vat was drained. what is the average change in the vat's water level per hour? enter your answer in the box as a decimal.

To find this answer, you must do the equation -9.9 / 2.25 = -4.4

As a result of solving that, the average change in the vat's water level per hour is -4.4 inches per hour.

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not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this