document.write( "Question 135593: It takes a driver about 3/4 second to begin braking after seeing something on the road. How many feet does a car travel in that time if it is going 10mi/hr? 20mi/hr? 30mi/hr? \n" ); document.write( "

Algebra.Com's Answer #99341 by dbashant(7) $\"\"$ $\"About$

You can put this solution on YOUR website!
These problems are quite easy if you know the trick.\r
\n" ); document.write( "\n" ); document.write( "We have miles per hour and we need feet per second.\r
\n" ); document.write( "\n" ); document.write( "This requires two conversions, one from miles to feet and one from hours to seconds.\r
\n" ); document.write( "\n" ); document.write( " $\"%2810mi%2F1hr%29%2A%285280ft%2F1mi%29%2A%281hr%2F60min%29%2A%281min%2F60sec%29\"$ \r
\n" ); document.write( "\n" ); document.write( "Notice how the miles, hours and minutes units will cancel each other out, leaving the feet per second.\r
\n" ); document.write( "\n" ); document.write( "Simplifying this expression will give us feet per second. Then you must multiply by 3/4 to get the final answer. \r
\n" ); document.write( "\n" ); document.write( "Then you should repeat the process for 20mi/hr and 30 mi/hr. \n" ); document.write( "

\n" );