Solve Problems (Part 1) Cool Down: A Moldy Surface The equation a = 4. e(0.45m) represents the area of a wall a, in square feet, that is covered by mold m months since the mold was first spotted. The area of the wall is 80 square feet. 1. Use the graph representing to estimate when the entire wall will be covered in mold if it is not cleaned. a (area in square feet) 120 100 80 60 40 20 1 2 3 4 5 m (months) 6 7 8 2. Write and solve an equation to find the approximate number of months it would take for the mold to cover the entire wall. Show your reasoning.

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