Predicted visitors in 2020 = 524*(1.05^13) = 988 (rounded to nearest whole number).
Explanation:
Similar to a compound interest question, visitors = starting number*(rate^years).
Staring Number = 524, Rate = 550/524 = 1.05 (3 sig. fig.) (increase from 2007 to 2008), Years = 13 (2020-2007).
Predicted visitors in 2020 = 524*(1.05^13) = 988 (rounded to nearest whole number).