document.write( "Question 596354: Air Pollution the amount of mitrogen dioxide A in parts per million (PPM) that presetn in the air in the city of homer on a certain day in june is modeled by the function a(t)=-2t^2+32t+12
\n" ); document.write( "Where t is the number of hours after 6:00 am use this function to find the time at which the nitrogen dioxide level was at its maximum. \n" ); document.write( "
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Air Pollution the amount of mitrogen dioxide A in parts per million (PPM) that presetn in the air in the city of homer on a certain day in june is modeled by the function a(t)=-2t^2+32t+12
\n" ); document.write( " Where t is the number of hours after 6:00 am use this function to find the time at which the nitrogen dioxide level was at its maximum.
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\n" ); document.write( "Because the coefficient associated with the t^2 term is negative, we KNOW that it is a parabola that opens downwards. So, the vertex is the max.
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\n" ); document.write( "t-value at max:
\n" ); document.write( "t = -b/(2a)
\n" ); document.write( "t = -32/(2(-2))
\n" ); document.write( "t = -32/(-4)
\n" ); document.write( "t = 8 hours
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\n" ); document.write( "6:00 am + 8 hours = 2 pm\r
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