How large a sample size is needed to estimate the mean annual income of people in a certain county, correct to within $1300 with probability 0.99? no information is available about the standard deviation of their income. it is estimated that nearly all of the incomes fall between $0 and $180 , 000 and that this distribution is approximately bell-shaped.

the reason why your question keeps getting deleted because this is not a school related question : )

i will answer your question though.

i never tried church's

the answer is 2/54

step-by-step explanation:

d 25 pi/6

step-by-step explanation:

the diameter is 10 inches

the radius is 1/2 of the diameter or 5 inches

the area of the circle is

a = pi r^2

  = pi 5^2

  = 25 pi

the slice is 60 degrees of the entire circle.

60 degrees out of 360   60/360 = 1/6

the area of the slice is 1/6 of the circle

a slice = 1/6 a circle

a slice = 1/6 * 25 pi