It’s IXL I absolutely suck at it, please help!!

Answer:
[tex]\huge \boxed{s^{-28} }[/tex]
Step-by-step explanation:
[tex]s^{-4} \cdot s^{-24}[/tex]
Applying exponent rule : [tex]a^b \cdot a^c=a^{b+c}[/tex]
[tex]s^{-4} \cdot s^{-24} = s^{-4+-24}=s^{-28}[/tex]