What is the inverse of the function f(x) = 2x + 1?

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.)

This is different from the first one can someone me

When a rectangle is dilated, how do the perimeter and area of the rectangle change?