Question 1185832

{{{h=.5*gt^2}}}

{{{g=980(cm/s^2) }}}
{{{t=20s}}}

{{{h=.5*980(cm/s^2)(20s)^2}}}

{{{h=.5*980(cm/s^2)400s^2}}}.........cancel squared seconds

{{{h=.5*980cm*400}}}

{{{h=196000cm}}} or  {{{h=1960m}}}