Week 1: 55 visitors
Week 2: 2 * 55 = 110 visitors
Week 3: 2 * 110 = 220 visitors
Week 4: 2 * 220 = 440 visitors
Week 5: 2 * 440 = 880 visitors
To find the total number of visitors in the first 5 weeks, we can add up the number of visitors from each week:
Total number of visitors = 55 + 110 + 220 + 440 + 880 = 1705 visitors
Therefore, the total number of visitors to the website in the first 5 weeks is 1705.