Bob rides a bike to school, within the first 10 minutes, his average speed is 4 m/s, and he speeds up after that, and his average speed becomes 6 m/s, and he arrived school in another 20 minutes. What is his average speed in meters per minute for the trip?

The stem-and-leaf plot shows the heights in centimeters of teddy bear sunflowers grown in two different types of soil. soil a soil b 5 9 5 2 1 1 6 3 9 5 1 0 7 0 2 3 6 7 8 2 1 8 3 0 9 key: 9|6 means 69 key: 5|8 means 58 calculate the mean of each data set. calculate the mean absolute deviation (mad) of each data set. which set is more variable? how do you know?