The ages of people working in an office are shown in the stem and leaf plot. find the mean median and mode of the data

  median: 33; modes: 28 and 33

Step-by-step explanation:

There are 15 points in the data set, so the median value is the 8th one from either end. That value is 33.

The mode is the data value that appears most often in the data set. There are two values that appear twice: 28 and 33. No value appears 3 times, so both these numbers are modes of the data.

to find the perimeter, you add up all the lengths of the sides. in this case you would have to add up 18+22+40+80 which equals 160.