document.write( "Question 1168121: The time it takes Jessica to bicycle to school is normally distributed, with a mean time of 15 minutes and a variance of 4 minutes. Jessica has to be at school at 8:00am. What time should she leave her house so she will be late only 4% of the time? \n" ); document.write( "
Algebra.Com's Answer #792786 by VFBundy(438)\"\" \"About 
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\"%28x+-+15%29%2F4\" = 1.75 (from z-table)
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\n" ); document.write( "x - 15 = 4(1.75)
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\n" ); document.write( "x - 15 = 7
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\n" ); document.write( "x = 22
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\n" ); document.write( "If Jessica leaves her house by 7:38 AM (22 minutes before 8:00 AM), she will be late only 4% of the time.
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