Verified answer

Answer:

5.8×10⁴-1.5×10³

=(5.8x10)10³-1.5×10³

=(58-1.5)10³

=56.5 x 10³

In terms of significant figure,

If 5 is dropped, previous digit remains unchanged as it is even.

[tex] \hookrightarrow[/tex]=5.8×10⁴-1.5×10³

=5.8×10000-1.5×1000

=56,500(Rounded off)