Answer :
You have to determine which of the given numbers are less than 1.
In order to determine that, you consider that any quantity powered to 0 is 1. That is, you have for any value x:
[tex]x^0=1[/tex]You consider the previoues situation to determine the numbers that are lee than 1.
Thus, for each of the given cases you have:
x⁰ = 1. It is no less than 1
(-15)⁰ = 1. It is not less than 1
-(15)⁰ = - (1) = -1. It is less than 1
-(15⁰) = -(1) = -1. It is less than 1.
-(0.23)⁰ = -(1) = -1. It is less than 1.
In all previoues cases you have considered that any number powered to 0 is 0.