Help, again my brain is useless

What is the square root of 45? (step by step working plz)

Asequence {an} is defined recursively, with a1 = 1, a2 = 2 and, for n > 2, an = an-1 an-2 . find the term a241. a) 0 b) 1 c) 2 d) 1 2

What is 1.5% of 120 or what number is 1.5% of 120