Which of the following is a result of shifting a circle with equation (x - 2)2 + (y - 3)2 = 25 up 2 units?   a. both the x- and y-coordinates of the center of the circle decrease by 2.   b. the x-coordinate of the center of the circle increases by 2.   c. both the x- and y-coordinates of the center of the circle increase by 2.   d. the y-coordinate of the center of the circle increases by 2.

If your score on your next statistics test is converted to a z score, which of these z scores would you prefer: minus2.00, minus1.00, 0, 1.00, 2.00? why? a. the z score of 2.00 is most preferable because it is 2.00 standard deviations above the mean and would correspond to the highest of the five different possible test scores. b. the z score of 0 is most preferable because it corresponds to a test score equal to the mean. c. the z score of minus2.00 is most preferable because it is 2.00 standard deviations below the mean and would correspond to the highest of the five different possible test scores. d. the z score of minus1.00 is most preferable because it is 1.00 standard deviation below the mean and would correspond to an above average