use ai If Upper C left parenthesis t right parenthesis equals 79.4 t e Superscript negative 0.13 t measures the concentration, in StartFraction ng Over ml EndFraction , of a drug in a person's system t hours after the drug is administered, how quickly is the conentration changing 14 hours from now? Question content area bottom Part 1 It is changing at enter your response here units per hour. (Round to two decimal places.)