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Posted by **karon** on Tuesday, December 13, 2011 at 6:25pm.

- algebra -
**Reiny**, Tuesday, December 13, 2011 at 6:37pmd ∝v^2

d = k v^2

for the given...

360 = k(80)^2

k = 360/6400

= 9/160

so if v = 70

d = (9/160)(4900) = 275.625 ft

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