Ed Greenwood promised to pay his son $$400$ semiannually for $12$ years. Assume Ed can invest his money at $6\%$ in an ordinary annuity. How much must Ed invest today to pay his son $$400$ semiannually for $12$ years?

Financial analysts recommend investing $15\%$ to $20\%$ of your annual income in your retirement fund to reach a replacement rate of $70\%$ of your income by age $65.$ This recommendation increases to almost $30\%$ if you start investing at $45$ years old. Mallori Rouse is $25$ years old and has started investing $$3,000$ at the end of each year in her retirement account. How muchwill her account be worth in $20$ years at $8\%$ interest compounded annually? How much will it be worth in $30$ years? What about at $40$ years? How much will it be worth in $50$ years? Round to the nearest dollar.

After paying off a car loan or credit card, don't remove this amount from your budget. Instead, invest in your future by applying some of it to your retirement account. How much would $$450$ invested at the end of each quarter be worth in $10$ years at $4\%$ interest?