Which of the following is not a function? a(3,1), (-3, 2), (4, 5), (-4, 5), (0, 0)
b(1, 2), (3, 4), (1, 5), (5, 7), (2, 4)
c(-4, 1), (-2, 3), (-1, 5), (0, 6), (-3, 5)
d(1, 3), (2, 3), (4, 5), (6, 4), (8, 9)
please help I'm timed.

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

You are shooting hoops after school and make 152 out of a total of 200. what percent of shots did you make? what percent did you miss? show proportion(s).

What is the ratio for the surface areas of the cones shown below, given that they are similar and that the ratio of their radii and altitudes is 2: 1? submit