Question 550793
(4x10^ 2))^(-2)

{{{1/(4*100)^2}}}


{{{1/400^2}}}


{{{1/160000}}}

{{{6.25*10^(-6)}}}



(6.9x10^3)/10^-4

{{{(6.9 *10^(3)*10^(4))}}}

{{{6.9 * 10^(7)}}}