2. A plastic sun visor allows light to pass through, but reduces the intensity of the light. The intensity is reduced by 5% for each additional millimeter of thickness. How thick is a piece of plastic that reduces the intensity of the light to 45%? Round your final answer to the nearest thickness. [S marks A] Exponential Growth and Decay: Exponential growth/decay: f(x) = a - b*/* where f(x) is the final amount or number o a is the initial amount or number For exponential growth, b = 1 + growth rate o For exponential decay, b = 1 decay rate o o o x is the number of growth or decay o h is the growing or decaying period