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 Leaf
7 4 5 5 5
8 0 0 3 4 8
9 9
11 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.
(1 point)
The range of the speeds of the fastest steel roller coasters in Europe is 47
mph. The range of the speeds of the fastest steel roller coasters in North America is 45
mph.

Answer 1

To find the range, you subtract the smallest speed from the largest speed.

For Europe:
Largest speed: 91 mph
Smallest speed: 74 mph

Range = 91 - 74 = 17 mph

For North America:
Largest speed: 128 mph
Smallest speed: 85 mph

Range = 128 - 85 = 43 mph

Therefore, the range of the speeds of the fastest steel roller coasters in Europe is 17 mph and in North America is 43 mph.