The Johnson and Smith families want to determine the difference in utility prices between March, when it's warmer, and January. Matrix J is for January. The rows represent electric, natural gas, and cable/satellite. The columns are the Johnson and Smith Family. Matrix M is for March. Write a matrix to show the difference in prices from January to March (J-M)? What do you think it means when you get a negative number in your resulting matrix?

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year the population of her town is changing by a constant rate

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. consider the given table.

Now 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.