In: Finance
Your grandma has been putting 1000 into a savings account on every bday since your first(that is, when you turned 1). The account pays an interest rate of 3%. How much money will be in the account on your 18th birthday after you gma makes the deposit on that birthday?
| A/c balance after 18 years | P×[(1+r)^n-1]÷r | |
| Here, | ||
| A | Interest rate per annum | 3% | 
| B | Number of years | 18 | 
| C | Number of payments per per annum | 1 | 
| A÷C | Interest rate per period ( r) | 3% | 
| B×C | Number of periods (n) | 18 | 
| Payment per period (P) | $ 1,000 | |
| A/c balance after 18 years | $ 23,414.44 | |
| 1000×((1+3%)^18-1)÷3% |