A tornado traveled 100 miles in 2 1/2 hours. How many miles per hour did it travel.

40 mph

Step-by-step explanation:

Divide 100 by 2.5, or 2 and 1/2. You get 40, which is the mph. This is because 40 is the number of miles that can be done in one hour.

where's the diagrams?

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.