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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.

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

This stem-and-leaf plot represents the speeds of the fastest steel roller coasters in Europe, where the stem indicates the tens digit and the leaf represents the ones digit.
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)

This table displays the speeds of the fastest steel roller coasters in North America, categorized by country. The values represent speeds 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
mph. The range of the speeds of the fastest steel roller coasters in North America is
mph.
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1 answer

To find the range of speeds for the fastest steel roller coasters on both continents, we need to determine the minimum and maximum speeds from the stem-and-leaf plot for Europe and the table for North America.

1. Speeds of the Fastest Steel Roller Coasters in Europe:

From the stem-and-leaf plot:

  • The least speed is represented by the smallest leaf for the stem 7, which is:
    • 7 | 4 = 74 mph
  • The greatest speed is represented by the largest leaf for the stem 11, which is:
    • 11 | 1 = 111 mph

To calculate the range: \[ \text{Range} = \text{Maximum} - \text{Minimum} = 111 - 74 = 37 \text{ mph} \]

2. Speeds of the Fastest Steel Roller Coasters in North America:

From the table:

  • The least speed is:
    • 85 mph (from Mexico)
  • The greatest speed is:
    • 128 mph (from Canada)

To calculate the range: \[ \text{Range} = \text{Maximum} - \text{Minimum} = 128 - 85 = 43 \text{ mph} \]

Final Answer:

  • The range of the speeds of the fastest steel roller coasters in Europe is 37 mph.
  • The range of the speeds of the fastest steel roller coasters in North America is 43 mph.