document.write( "Question 532053: The formula R = -0.075 + 3.85 can be used to predict the world record in the 1500 meter run, t years after 1930. Dertermine an inequality that identifies the years in which the world record will be < 3.7 minutes. t < ___ ? I have been bandging my head, and just cannot getthe formula, sorr to be so duh! Thanks...... have a good one \n" ); document.write( "
Algebra.Com's Answer #350676 by ankor@dixie-net.com(22740)\"\" \"About 
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The formula R = -0.075 + 3.85 can be used to predict the world record in the 1500 meter run, t years after 1930. Determine an inequality that identifies the years in which the world record will be < 3.7 minutes. t < ___ ?
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\n" ); document.write( "Assume the formula is:
\n" ); document.write( "R = -0.075t + 3.85
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\n" ); document.write( "-.075t + 3.85 < 3.7 min
\n" ); document.write( "-.075t < 3.7 - 3.85
\n" ); document.write( "-.075t < -.15
\n" ); document.write( "t had to be positive, multiply both sides by -1, this reverses the inequality sign
\n" ); document.write( ".075t > .15
\n" ); document.write( "t > \".15%2F.075\"
\n" ); document.write( "t > 2 yrs
\n" ); document.write( "Add that to 1930, we can say it will be less than 3.7 min after 1932
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\n" ); document.write( "We can confirm that by finding the time in 1933 (t=3)
\n" ); document.write( "R = -0.075(3) + 3.85
\n" ); document.write( "R = -.225 + 3.85
\n" ); document.write( "R = 3.625 min, slightly less than 3.7
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\n" ); document.write( "Hey! I have not heard that one before, does bandaging your head actually help? \n" ); document.write( "
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