To determine if the model distances are proportional to the actual distances of the solar system, we need to calculate the ratios of the model distances to the actual distances for both the Earth and Neptune.
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For Earth:
- Model distance from the Sun to Earth = 7 inches
- Actual distance from the Sun to Earth = 91.549 million miles
The ratio for Earth is: \[ \text{Ratio}_{\text{Earth}} = \frac{7 \text{ inches}}{91.549 \text{ million miles}} \]
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For Neptune:
- Model distance from the Sun to Neptune = 19 inches
- Actual distance from the Sun to Neptune = 2,780.5 million miles
The ratio for Neptune is: \[ \text{Ratio}_{\text{Neptune}} = \frac{19 \text{ inches}}{2,780.5 \text{ million miles}} \]
Next, we can check if these ratios are equal:
Calculating or simplifying the ratios would give their relationship.
If the ratios of the model distances to the actual distances of both planets are equal, then we can conclude that the model distances are proportional to the actual dimensions of the solar system. If not, they are not proportional.
Given your options, the correct choice based on our analysis would be B No because the ratio of model length to actual distance are different for the two planets, explaining that the distinct ratios indicate inconsistency in proportionality.