treasury bills, notes and bonds? please help?

Nichole asked: am i doing this right….. if i invest $1000 in a treasury bill at a discount rate of 4.790% and the investment rate is 4.930%, then i will pay $952.10 to buy the bill and i will get $1049.30 when it matures?… therefore making a profit of $97.20
if thats not right please tell [...]