Answer:
12 years or 6 years i am not certain.
Explanation:
2500×1.06=2650
2650×1.06=2809
2809×1.06=2977.54
2977.54×1.06=3156.1924
3156.1924×1.06=3345.563944
3345.563944×1.06=3546.297781
3546.297781×1.06=3759.075647
3759.075647×1.06=3984.620186
3984.620186×1.06=3984.620186
3984.620186×1.06=4477.119241
4477.119241×1.06=4745.746396
4745.746396×1.06=5030.49118
12 years or
2500×1.06²=2809
2809×1.06²=3156.1924
3156.1924×1.06²=3546.297781
3546.297781×1.06²=3984.620186
3984.620186×1.06²=4477.119241
4477.119241×1.06²=5030.49118
6 years