I wanted to help students see that exponential equations apply to real life scenarios. The Murder Mystery takes about 40-45 minutes to complete and should follow a lesson in which students have already learned Newton’s Law of Cooling, and solving exponential equations. I chose to do the activity as a review day.
Students loved the idea of solving a murder using mathematics. I have a hint sheet to help students who struggle with solving exponential equations. Although very few students used it. Students first calculate the time of death for a victim. Then they solve exponential equations to determine if suspects have an alibi.