If the statement "if the sun is shining, then it's not raining" is assumed to be true, is its reverse, "if it's not raining, then the sun must be shining," also always true?

4+6x-3x^3 in standard form with explanations because i don’t understand

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?