You take random sample of 200 200
people from Salinas and find that their average income is $48,000
$
48
,
000
per year with a standard deviation of $9000
$
9000
. Also assume that population incomes are normally distributed.
Approximately how many people make between $39,000
$
39
,
000
and $57,000
$
57
,
000
?

c. side angle side. u shares the same sides

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.