what is 2ˉ³ and how is it worked out?

2^-3

=1/2^3
=1/8 answer//

Since the power is negative, we put it down on the fraction:

= 1 / 2^(3).

2^3 is 8. Thus the answer is 1 / 8

2^3 = 2*2*2 = 8
2^2 = 2*2 = 4
2^1 = 2
2^0 = 2/2 = 1
2^-1 = 1/2
2^-2 = 1/2^2 = 1/4
2^-3 = 1/2^2^2 = 1/8

2^-3
= 1/(2^3)
= 1/8

Since the exponent is (-3) then the answer is in a fraction...so your problem would look like this
1
---
2ˉ³

which is also 1/2ˉ³

which makes your answer:
1
---
2(2)(2)

which EQUALS (=)

1
---
8

*So your answer is 1/8!*

Anytime the exponent is a negative just remember you need to make it a FRACTION so put 1 over your answer...**Like ABOVE ^^^^ ** Hope you get it!

Hope I helped!!
Pick me as best answer! :)

keep in mind
A^-n=1/A^n
so
1/2^3=1/2*2*2
1/8