Pls help extra points and mark brainlist

Writing the simplest form of a fraction means the numerator and the denominator have no common factors other than 1.a. trueb. false

Which expression is equivalent to 4 square root 6 divided by 3 root 2

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?