5. Harold rolls his $800 000 of savings into an annuity account. He wants the money to last for 15
years
(a) Given that Harold can withdraw $6284.75 each month, find the annual interest rate,
compounded monthly, of the account.
[3]
(b) How much longer would Harold's money last if he withdrew only $5000 each month?
[3]

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.