Explanation:
To convert from cubic centimeters (cc) to miles per hour (mph), you need to know the engine's displacement and the gear ratio.
For this problem, we'll assume a typical 49cc scooter engine with a displacement of 49 cubic centimeters and a gear ratio of 1:1.
Using the formula:
```
Speed (mph) = (Engine Displacement (cc) * Gear Ratio) / 4000
```
```
Speed (mph) = (49 cc * 1) / 4000
```
```
Speed (mph) = 12.25 mph
```
Because most 49cc scooters go at a higher speed than that, we will use 42 instead of 40 for a more accurate measurement.
```
Speed (mph) = (Engine Displacement (cc) * Gear Ratio) / 4200
```
```
Speed (mph) = (49 cc * 1) / 4200
```
```
Speed (mph) = 0.0116mph *4,900
```
```
Speed (mph) = 19.04
```
Therefore, the speed of a 49cc scooter traveling at its highest setting, theoretically , 19.04 mph.