Can i get help on a 7 part assignment? I have already done 4 parts of it and its a redo. PLEASE HELP I NEED THIS DONE TODAY AND GIVING 150 points across this post and the next one

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

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

D(5, 7). e(4,3), and f(8, 2) form the vertices of a triangle. what is mzdef? oa. 30° ob. 45° oc. 60° od 90°