A hot air balloon is flying at an altitude of 4000 feet. It reduces its altitude by 3% in order to change direction. After it changes direction, it increases its altitude by 500 feet. What is the final altitude of the hot air balloon?

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feet

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7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet

34

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