NEED HELP !! #12,13,14

What is the rescursive formula for this geometric sequence? 7, -14, 28, -56

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

When are triangles considered similar? a. corresponding angles are equal andcorresponding sides are proportionalb. corresponding angles are proportional andcorresponding sides are equalc. corresponding angles are equal orcorresponding sides are proportionald. corresponding angles are proportional orcorresponding sides are equal select the best answer from the choices providedmark this and retumsave and exitnext