QUICK SOLVE a radio station has three types of promotional items: cds, hats and flying discs. cds are worth $4.50, hats are worth $3.25 and flying discs are worth $1.25. they have given away 11 cds, 26 hats and 53 flying discs. organize the information using matrices. then use matrix multiplication to find the station's total cost for promotional items.

write matrix equation and solve it by hand.

edit: bump, please answer!

1. why is a frequency distribution useful? it allows researchers to see the "shape" of the data. it tells researchers how often the mean occurs in a set of data. it can visually identify the mean. it ignores outliers. 2. the is defined by its mean and standard deviation alone. normal distribution frequency distribution median distribution marginal distribution 3. approximately % of the data in a given sample falls within three standard deviations of the mean if it is normally distributed. 95 68 34 99 4. a data set is said to be if the mean of the data is greater than the median of the data. normally distributed frequency distributed right-skewed left-skewed