Select the symbol = (equal to) or ≠ (not equal to) to make the expression true. {0} ? { }

=
≠

Answer! if you don’t mind, can you explain

Is the number 128.439 a rational number

Rena used the steps below to evaluate the expression , when . step 1: substitute into the expression. step 2: simplify the parentheses. step 3: evaluate the power to a power. step 4: use reciprocals and find the value. in which step did rena make the first error?