Similar means that the figures are proportional to each other. Because of this, we can form a problem. (the short side lengths) = (the long side lengths). Now we can solve this by cross-multiplying. If we multiply 9 · 8 we get 72, and 5 · x is 5x. 72 = 5x. Now divide both sides by 5. 72 ÷ 5 = 14.4. Therefore, x should be equal to 14.4. Does this make sense?
The answer is D. The first one says you add -4 each time in the sequence. The second says you add -2 each time in the sequence. The third says you multiply by -2 each time in the sequence. The fourth says you multiply by -4 each time in the sequence. -2*-4=8 8*-4=-32
By looking at the answer a is eliminated by default since it is not between 6 and 7 which also eliminates e. now you’re left with b and c and you have to remember the definition of an irrational number (in short, it’s a number that never ends) which would leave you with c