Tyler has 2 liters of water and drinks half of it. how many milliliters of water does he have left?

This is about circle theorems. someone asap : (

Having a hard time understanding this question (see attachment).

A) find the derivative of the inverse to f(x) = 3x + sint at x 6. b) (cale) find the derivative of the inverse to f(x)+3sin at x 6. if x +2y -34, ind he behaviar of the cure at 4,.3), c) a. increasing, concave up d. decreasing, concave down b. increasing, concave down e. decreasing, inflection point c. decreasing, concave up