Cory has 15 die-cast cars In his collection. Each year his collection Increases by 20%. Roger has 40 cars In his collection. Each year he collects 1 additional car. Part A: Write functions to represent Cory and Roger's collections throughout the years.  Part B: How many cars does Cory have after 6 years? How many does Roger have after the same number of years?  Part C: After approximately how many years is the number of cars that Cory and Roger have the same? Justify your answer mathematically.

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