Consider a circle whose equation is x2 + y2 - 2x - 8 = 0. which statements are true? select three options.

1- the radius of the circle is 3 units.

2- the center of the circle lies on the x-axis.

3- the center of the circle lies on the y-axis.

4- the standard form of the equation is (x - 1)2 + y2 = 3.

5- the radius of this circle is the same as the radius of the circle whose equation is x2 + y2 = 9.

Needmax recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.