NAEP Mathematics Grade 8

Category - Mathematics

The formula d = 16 t2 gives the distance d, in feet, that an object has fallen t seconds after it is dropped from a bridge. A rock was dropped from the bridge and its fall to the water took 4 seconds. According to the formula, what is the distance from the bridge to the water?
  1. 16 feet
  2. 64 feet
  3. 128 feet
  4. 256 feet
  5. 4,096 feet
Explanation
Answer: D - 256 feet
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