Amedical researcher wants to construct a 99% confidence interval for the proportion of knee replacement surgeries that result in complications. an article in the journal of bone and joint surgery suggested that approximately 8% of such operations results in complications. using this estimated, what sample size is needed so that the confidence interval will have margin of error of 0.075

b.-4 units

all you   do is count how many times you move

let's first notice, the center of the hyperbola is at the origin, since the focus points are equidistantly 3 units away from the origin, that also means that the distance "c" from the center to either focus is 3.

it should also be notable that, the traverse axis for this hyperbola is vertical, or namely over the y-axis and therefore, the positive fraction will be the one with y-variable.

the traverse "a" component or distance from the center to either vertex is not 2, is more than 2, so we can safely put it at √5 ≈ 2.24.

σк тнє αиѕωєя ιѕ (α.)

нσρє ι ¢συℓ∂ нєℓρ υ

the graph line crosses the x axis at both -6 and -2, so the answer would be the second one.