Please solve asap will mark brainiest

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

Which of the following correctly justifies statement four of the two column proof? a. corresponding angles theorem b. transitive property of equality c. vertical angle theorem d. substitution property of equality

Use multiples to write two fractions equivalent to 7/9. 14/18, 8/10 6/8, 21/27 10/12, 28/36 14/18, 21/27