Can anyone me on part b also explain how you gotten the answer

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

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

In the geometric progression –3, 12, −48… what term is 3,072?