*NEED THIS DONE IN FIVE MINUTES!!!!!!!!* WILL GIVE EVERYTHING IF RIGHT

Find the domain and range of the exponential function h(x) = 125^x.
Explain your findings.
As x decreases, does h increase or decrease? Explain.
As x increases, does h increase or decrease? Explain.

I KNOW:
As x decreases, h decreases.
As x increases, h increases.

Both the domain and range are all real numbers

BUT WHY?