document.write( "Question 1153627: A manufacturer knows that their items have a normally distributed lifespan with a mean of 2.9 years and a standard deviation of 0.6 years.\r
\n" ); document.write( "\n" ); document.write( "If you randomly purchase one item, what is the probability it will last longer than 4 years? Round answer to 3 decimal places.
\n" ); document.write( "

Algebra.Com's Answer #775901 by Boreal(15235)\"\" \"About 
You can put this solution on YOUR website!
z=(x-mean)/sd
\n" ); document.write( ">(4-2.9)/0.6 or > 1.1/0.6
\n" ); document.write( "this has probability of 0.0334 or 0.033
\n" ); document.write( "
\n" ); document.write( "
\n" );