David saves money from his teaching job to buy a new boat when he retires in 20 years. the boat will cost $30,000. he has $12,000 in his simple interest savings account. to reach his goal by retirement, david should

Depending on how old David is right now, David should keep saving his money in his simple interest account. At that rate every year, he will be able to buy his 30,000$  boat. David would need to put at least 5-10% of his income in his simple interest savings account. Hope this helps :)