Question

Which number has the greatest value?

Answer 1

For this simply find out which each equals

$6.7\cdot \:10^4 \ \textgreater \ 10^4=10000 \ \textgreater \ 10000\cdot \:6.7 \ \textgreater \ 67000$

$7.6\cdot \:10^{-4} \ \textgreater \ \mathrm{Convert\:element\:to\:a\:decimal\:form} \ \textgreater \ 10^{-4}=0.0001$
$0.0001\cdot \:7.6 \ \textgreater \ 0.00076$

$8.9\cdot \:10^3 \ \textgreater \ 10^3=1000 \ \textgreater \ 1000\cdot \:8.9 \ \textgreater \ 8900$

For the 4th one, it is 0.008

Therefore which do you think is the greatest? Hope this helps!