147 let us let u = [ 47 21 -3 and a= 0 1 -2 . is u in the subset of r | 1 3 - 2 spanned by the columns of a? why or why not? select the correct choice below and fill in the answer box to complete your choice. (type an integer or decimal for each matrix element.) o a. no, the reduced row echelon form of the augmented matrix is , which is an inconsistent system. ob. yes, multiplying a by the vector writes u as a linear combination of the columns of a.

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.