How would you evaluate.   5⋅ 4 0

It is understood that the number to evaluate is 5.4^0, which is 5.4 raised to the power zero.

There is a rule for this: any number raised to the power zero is 1.

So, 5.4 ^ 0 = 1.

You can show that any number raised to the power of zero is 1 using this:

A^0 = (A)^(m - m) = [A^m] / [A^m]

Given that the numerator and the denominator of that fraction are equals the result is 1.