document.write( "Question 477058: The formula R=-0.075t+3.85 can be used to perdict the world record in the 1500 meter run, t years after 1930. Determine an inequality that identifies the year in which the world record will be less then 3.4 minutes.
\n" ); document.write( "solve for t
\n" ); document.write( "t>? \n" ); document.write( "
Algebra.Com's Answer #327105 by ankor@dixie-net.com(22740)\"\" \"About 
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The formula R=-0.075t+3.85 can be used to predict the world record in the 1500 meter run, t years after 1930.
\n" ); document.write( " Determine an inequality that identifies the year in which the world record will be less then 3.4 minutes.
\n" ); document.write( "solve for t>
\n" ); document.write( ":
\n" ); document.write( "-0.075t + 3.85 < 3.4
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\n" ); document.write( "-0.075t < 3.4 - 3.85
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\n" ); document.write( "-0.075t < - .45
\n" ); document.write( "Get rid of the negative t, multiply both sides by -1, the reverses the inequality sign
\n" ); document.write( ".075t > .45
\n" ); document.write( "t > \".45%2F.075\"
\n" ); document.write( "t > 6 yrs after 1930
\n" ); document.write( "We can say that in 1937, the record will be less than 3.4 min
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\n" ); document.write( "Check this. Find the record in 1937, (t=7)
\n" ); document.write( "r = -0.075(7) + 3.85
\n" ); document.write( "r = -.525 + 3.85
\n" ); document.write( "r = 3.325 min in 1937 just under 3.4 \n" ); document.write( "
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