Answer: This was curious, because during so-called REM sleep (rapid eye movement), our muscles are usually paralysed. Researchers realised that inducing a similar state in animals could allow them to probe how they dream.
Explanation:
Wait which nations, like USA, Australia, England?
Answer:
x=36
Explanation:
Because it's enlarged, you know that the two triangles are similar triangles, which means the ratio between corresponding sides are the same.
16/x=20/45, so x=36
