document.write( "Question 542741: Karen has to run five laps around a small track with a radius of 40 meters. How far must she run? Use 3.14 for pie. \n" ); document.write( "
Algebra.Com's Answer #354662 by lmeeks54(111)![]() ![]() You can put this solution on YOUR website! You need the formula for the perimeter of a circle to solve this one. \n" ); document.write( "... \n" ); document.write( "Let P = the perimeter of the circular track \n" ); document.write( "Let r = the radius of the circle in meters \n" ); document.write( "... \n" ); document.write( "Given: \n" ); document.write( "pi = 3.14 \n" ); document.write( "r = 40m \n" ); document.write( "P = 2pi * r \n" ); document.write( "... \n" ); document.write( "First figure out the distance one lap takes...which is the perimeter of the circle (track): \n" ); document.write( "... \n" ); document.write( "P = 2(3.14)(40) \n" ); document.write( "P = 251.2 meters \n" ); document.write( "... \n" ); document.write( "Then calculate for Karen running around the track 5 times: \n" ); document.write( "her run = 5 * P \n" ); document.write( "her run = 5 (251.2) \n" ); document.write( "her run = 1,256 meters \n" ); document.write( "... \n" ); document.write( "cheers, \n" ); document.write( "Lee \n" ); document.write( " |