PLEASE HELP!! TEST QUESTION! Simplify square root of 2 divided by the square root of 5. Show all work for credit

(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)

The number of nails of a given length is normally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. find the number of nails in a bag of 120 that are less than 4.94 in. long.

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.