Question 1076661
If Sarah is saving each week for 2 years,compounded weekly, then she makes a total of 104 payments, at .08/52, or 0.15385% interest each week. So:
100000=P[(1+.0015385)^104-1]/.0015385
153.85=P(0.17337128198498002006399816563696)
P=R 887.41 as the necessary amount of Sarah's weekly payment, in order to have an account balance of R100000 at the end of 2 years. ☺☺☺☺