The stem-and-leaf plot shows the speeds of the fastest steel roller coasters in Europe. The table shows the speeds of the fastest steel roller coasters in North America.

Question

Speeds of the fastest steel roller coasters in Europe (in miles per hour).

Stem
7,8,9,11
Leaf
4,5,5,5,0,0,3,4,8,9,1
Key: 7|4=74 miles per hour

Speeds of the Fastest Steel Roller Coasters in North America (in miles per hour)

Canada 90, 128, 91
U.S. 93 120 100
Mexico 95 92 85

Find the range of the speeds of the fastest steel roller coasters on both continents.

The range of the speeds of the fastest steel roller coasters in Europe is mph. The range of the speeds of the fastest steel roller coasters in North America is mph.

Answer 1

Europe: 111 mph - 74 mph = 37 mph

North America: 128 mph - 85 mph = 43 mph

Therefore, the range of the speeds of the fastest steel roller coasters in Europe is 37 mph and the range of the speeds of the fastest steel roller coasters in North America is 43 mph.