Cho hình chóp SABCD có đáy ABCD là hình vuông cạnh a tâm O mặt bên SAB là tam giác đều và góc D bằng 90 độ Gọi d x là đường thẳng qua d và song song với SC giao điểm I của đường thẳng d x với mặt phẳng SAB diện tích thiết diện của hình chóp SABCD cắt bởi AC là

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.

Bag a contains 3 white marveled and 2 marbles bag b contains 6 white marbles and 3 red marbles a person draws one marbles from each bag find the probability that both marbles are white

There are a total of 75 students in the robotics club and the science club. the science club has 11 more students than the robotics club. how many students are in the science club?