What is the circumference of the following circle?

plz help i need this now.

How do i make someone brainliest? (if you answer me, i might be able to make you brainliest! )

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? \ 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2x