A doctor at a local hospital is interested in estimating the birth weight of infants. Based on earlier studies, s = 10 ounces. How large a sample must she select if she wishes to be 95% confident that her estimate is within 2
ounces of the true mean?

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

Which statement accurately explains whether a reflection over the y-axis and a 270° counterclockwise rotation would map figure acb onto itself? a coordinate plane with figure acb with point a at 1, 1, c at 3, 4 and b at 5, 1 yes, a″c″b″ is located at a″(1, 1), c″(4, 3), and b″(1, 5) yes, a″c″b′ is located at a″(1, 1), c″(3, 4), and b″(5, 1) no, a″c″b″ is located at a″(1, 1), c″(4, 3), and b″(1, 5) no, a″c″b″ is located at a″(1, 1), c″(3, 4), and b″(5, 1)

What is the y intercept of f(x)=(1/2)^x?