Assume the box contains 9 balls:
4 red, 2 blue, and 3 yellow. a ball is drawn and its color noted. if the ball is yellow, it is replaced; otherwise, it is not. a second ball is then drawn and its color is noted.
what is the probability that the first ball was yellow, given that the second was red?

For which pair of functions is (gof)(a)=|a|-2?

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee,f, for a single job is a function of the number,t, of hours it takes him to complete the job. write the function's formula.

Me max 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.