Answer:
work is attached and shown
2 + 7 + 2 + 7 + 2 + 7 + 2 + 7 + 2 + 7 = 45
7 = 5 + 2
10 weeks
they have been saving their money for 10 weeks
Answer:
Yes
Step-by-step explanation:

If we say u = √n, then:

This is a geometric series. Since |1/e| < 1, the series converges.