Suppose the mean height in inches of all 9th-grade students at one high school is estimated. The population standard deviation 4 inches. The heights of 9 randomly selected students are 61,64,73,71,65,65,63,62 and 60. x= ?

Margin of error 95 % confidence level =?

95% confidence interval=? [smaller value],[larger value]

Mozart lenses inc. recently introduced seelites, a thinner lens for eyelasses. of a sample of 800 eyeglass wearers, 246 said they would purchases their next pair of eyeglasses with the new lenses. lenses inc. estimates that the number of people who purchase eyeglasses in a year is 1,700,000. most eyeglasses wearer buy one new pair of eyeglasses a year. what is the annual sales potential for the new lenses.

The length of a rectangle plus its width is 25 cm. the area is 156 square cm. what are the length and width of the rectangle? separate the answers with a comma.

This is about circle theorems. someone asap : (