Help please fast brainest to whos right

In the diagram, the ratios of two pairs of corresponding sides are equal to prove that almn - axyz by the sas similarity theorem, it also needs to be shown that x 6 z un z zz un = 2x zləzz lezy

Divide. –40 ÷ –5 a –8 b 200 c -200 d 8

Which of the following scenarios demonstrates an exponential decay