document.write( "Question 125465: From 1990 to 1993, the number of truck registrations (in millions) in the united states can be approximated by the model R=0.29t^2+45 where t is the number of years since 1990. During which year were approximately 46.16 million trucks registered. \n" ); document.write( "

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From 1990 to 1993, the number of truck registrations (in millions) in the united states can be approximated by the model R=0.29t^2+45 where t is the number of years since 1990. During which year were approximately 46.16 million trucks registered.
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\n" ); document.write( "46.16 = 0.29t^2+45
\n" ); document.write( "0.29t^2 = 1.16
\n" ); document.write( "t^2 = 4
\n" ); document.write( "Positive solution:
\n" ); document.write( "t = 2 years.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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