Mathematics, 02.04.2021 01:00 dontcareanyonemo

an experienced teaching assistant can grade all exams for a calculus class 2 hours faster than a new teaching assistant. Working together, the teaching assistants can grade all the exams for the calculus class in 7 hours. How long would it take for the new teaching assistant to grade all of the exams for the calculus class alone?

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an experienced teaching assistant can grade all exams for a calculus class 2 hours faster than a new...