Question 57916
This is the problem:  Use unit multipliers to convert 16,000 inches to miles.  
We may not know how many inches are in a mile, but we know that there are 12 in in 1 ft.  Therefore {{{(1ft)/(12in)=1}}}.
We also should know that there is 5280 ft in 1 mi.  Therefore {{{(1mi)/(5280ft)=1}}}
{{{((16000in)/1)*((1ft)/(12in))*((1mi)/(5280ft))}}}
{{{((16000*cross(in))/1)*((1*cross(ft))/(12*cross(in)))*((1mi)/(5280*cross(ft)))}}}
{{{16000*1*1mi/(1*12*5280)}}}
{{{(25/99)mi}}}
16,000 in.= .2525...mi
Happy Calculating!!!