What an expression for 4x - 12

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.)

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9