document.write( "Question 232879: Pairs of markings a set distance apart are made on highways so that police can detect drivers exceeding the speed limit. Over a fixed distance, the speed R varies inversely with the time T. In one particular pair of markings, R is 45 mph when T is 6 seconds. Find the speed of a care that travels the given distance in 5 seconds. \n" ); document.write( "
Algebra.Com's Answer #171974 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Over a fixed distance, the speed R varies inversely with the time T. In one particular pair of markings, R is 45 mph when T is 6 seconds. Find the speed of a car that travels the given distance in 5 seconds. \n" ); document.write( "----------------------------------------------------------- \n" ); document.write( "R = k[1/T] \n" ); document.write( "--- \n" ); document.write( "Find \"k\": \n" ); document.write( "45 = k[1/6] \n" ); document.write( "k = 260 \n" ); document.write( "--------------- \n" ); document.write( "R = 260[1/T] \n" ); document.write( "Find the speed of a car that travels the given distance in 5 seconds. \n" ); document.write( "--- \n" ); document.write( "R = 260/5 \n" ); document.write( "R = 52 mph \n" ); document.write( "==================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |