Time to travel 450 km is \( \frac{450}{75} = 6 \) hours.
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- After 3 years: \( 1102.50 \times 1.05 = 1157.625 \) dollars.
- A train travels 300 km in 4 hours. If it maintains the same speed, how long will it take to travel 450 km?
- The speed is \( \frac{300}{4} = 75 \) km/h.
- Check using Pythagoras' theorem: \( 7^2 + 24^2 = 49 + 576 = 625 \).
- A box contains 5 red, 7 blue, and 8 green marbles. If a marble is drawn at random, what is the probability it is not green?
- Non-green marbles = 5 + 7 = 12.
