Answer:
18 years (to the nearest year)
Step-by-step explanation:
<u>Compound interest formula</u>:

where A is amount, P is principal, r is interest rate (decimal format), n is the number of times interest is compounded per unit 't', and t is time
Given:
- A = 4490
- P = 2400
- r = 3.5% = 0.035
- n = 12






Therefore, it would take 18 years (to the nearest year) for the account to reach $4,490