Need plz supposed to turn 8/27 into exponents

Really simple when you look at it.

You need 3 numbers multipled together, which means you need the third root

what is a number that multipled by itself will give 8? how about 27?

2x2x2 = 8
3x3x3 = 27

so the answer in all of them is (2/3)x(2/3)x(2/3)

This polygon has 4 sides
180(4-2) = 180(2) = 360 degree
80+90+2x + 3x = 360
170+5x = 360
5x = 190
x= 38
measure of angle t is 2(38)= 76
the answer is c. trust me
hope this !