Fashion designer wants to know how many new dresses women buy each year. Assume a previous study found the variance to be 4. She thinks the mean is 7 dresses mer year. What is the minimum sample size required to ensure that the estimate has an error of at most 0.11 at the 90% level of confidence? Round your answer up to
the next integer.

Please help

1/800 is the right answer

vhhhbnbb. ddben jenner v

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.  

-23, -29, 34, -38, -45, -47, -59, 67, -78, -110, -514, 710