Can you help me with these two questions about nth roots?

1.  a  = ∛[12² ]  =   ∛144  = ∛[2⁴ * 3²] =  2∛[2 * 9]  = 2 ∛18  ≈ 5.24 AU

2.   2F  = Fr^6    where r is the factor   .....divide out F.......

       2  = r^6    take the  6th root of each side

       2^(1/6)  = r  ≈ 1.122