‼️PLEASE HELP!! ASAP‼️Find the missing side

Suppose investors can earn a return of 2% per 6 months on a treasury note with 6 months remaining until maturity. the face value of the t-bill is $10,000. what price would you expect a 6-month maturity treasury bill to sell for? (round your answer to 2 decimal places. omit the "$" sign in your response.)

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

How do you find principle and simple interest