+118723 $$\\\frac{850\;miles}{hour}=\frac{850\;miles}{60 min}=\frac{850\;miles}{60*60 sec}$$
$${\frac{{\mathtt{850}}}{\left({\mathtt{60}}{\mathtt{\,\times\,}}{\mathtt{60}}\right)}} = {\frac{{\mathtt{17}}}{{\mathtt{72}}}} = {\mathtt{0.236\: \!111\: \!111\: \!111\: \!111\: \!1}}$$ miles/sec
Multiply 850 by 60. Multiply that by 60.There are 3600 seconds in an hour. A speed of 850 miles per hour is 850/3600 miles per seconds = 0.23611 miles per second, which is just slightly less than one quarter mile per second.
+118723 $$\\\frac{850\;miles}{hour}=\frac{850\;miles}{60 min}=\frac{850\;miles}{60*60 sec}$$
$${\frac{{\mathtt{850}}}{\left({\mathtt{60}}{\mathtt{\,\times\,}}{\mathtt{60}}\right)}} = {\frac{{\mathtt{17}}}{{\mathtt{72}}}} = {\mathtt{0.236\: \!111\: \!111\: \!111\: \!111\: \!1}}$$ miles/sec
