document.write( "Question 1040419: The distance an object falls varies directly with the square of the time it spends falling. If a ball falls 78.4 meters after falling for 4 ​seconds, how far will it fall after 9 ​seconds? \n" ); document.write( "
Algebra.Com's Answer #655221 by Boreal(15235)\"\" \"About 
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d=kt^2
\n" ); document.write( "78.4=k*16
\n" ); document.write( "k=78.4/16=4.9
\n" ); document.write( "d=4.9*9^2=4.9*81=396.9 meters
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