### 10.2 The Olympics

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• Math Help

In Example 4, you can use the techniques from Section 1.4. To determine the average speed in miles per hour, you need to multiply 2 miles in 100 seconds by two carefully chosen forms of the number one. Because there are 60 seconds in 1 minute and 60 minutes in 1 hour, you can multiply as shown.

Another way to determine the average speed in miles per hour is to write 2 miles in 100 seconds as

Then use the Velocity Converter located in Tools to convert from miles per second (mile/second) to miles per hour (mile/hour). When you do this, you will get the same answer as above, 72 miles per hour.

• Consumer Suggestion

If you like to ski but can't get to the slopes, you might want to check out Candystand.com, where you can play a free downhill ski game, as well as many other free games.

• Checkpoint Solution

You can use a spreadsheet to make a bar graph of the top 15 times in the men's downhill at the 2010 Winter Olympics.

Another way to represent the data is by showing each skier in terms of time behind the winner. The stacked bar graph below illustrates the closeness of the top 15 times in the men's downhill at the 2010 Winter Olympics. Notice that all 15 skiers were within one second of winning.

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```  _____    _    _     _  _     _____    __   __
/ ____|| | || | ||  | \| ||  |  ___||  \ \\/ //
/ //---`' | || | ||  |  ' ||  | ||__     \   //
\ \\___   | \\_/ ||  | .  ||  | ||__     / . \\
\_____||  \____//   |_|\_||  |_____||  /_//\_\\
`----`    `---`    `-` -`   `-----`   `-`  --`

```