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posted by Ruth on Monday, August 29, 2011 at 5:17pm.

z= 18-17.5 ------ 1.8/ √16 I got: .5/.45

then when you divide that i got 1.111111111111111111111 so in the question they ask you to round to the 1st decimal place

rounding to the first decimal place would be 1.1

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