The expression 83−7.5t represent C. the volume of water left after t hours.
From the information, each hour, 7.5 liters drain from a large water tank and thee tank initially held 83 liters of water.
Therefore, the expression 83−7.5t represent the volume of water left after t hours.
In conclusion, the correct option is C.
Learn more about expressions on
brainly.com/question/22048677
#SPJ1