document.write( "Question 772137: How fast would you have to go to go 400 miles in 30 minutes? \n" ); document.write( "
\n" ); document.write( "Convert the minutes to hours, because the distance is in miles and rate will be miles per hour. 30 minutes is 1/2 or .5 hours.
\n" ); document.write( "400 = .5r
\n" ); document.write( "400/.5 = r = 800 miles per hour.