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12F Questions

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12F Questions

Postby calcguy1350 » Mon May 14, 2012 7:54 pm

Could you help me on these problems? Very much thank you in advance.

12F-26 Farmer Joe has a 5 acre farm that is rectangular with the sides in the ratio 1:1.5 . He want to fence in the farm with T-posts no more than 8ft apart with a T-post at every corner. How many T-posts does he need? Answer: 240 integer (I'm getting a close answer that is like plus or minus 2 the right answer, so how exactly do I get the 240?)

12F-46 A moving object has a kinetic energy proportional to the object's mass also the square of its velocity. Two meteors are 1200ft and 3800 ft across. The larger one moves at 60% the speed of the slower one. What is the ration of their kinetic energy, a number exceeding one? Answer: 11.4

12F-50 For the weird triangles i'm using heron's formula, is this the shortest and most efficient way?
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Re: 12F Questions

Postby 007math » Mon May 14, 2012 8:04 pm

3rd Place State Mathematics 5A 2012
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Re: 12F Questions

Postby 88bobcat » Tue May 15, 2012 3:06 pm

[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]
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Re: 12F Questions

Postby 88bobcat » Tue May 15, 2012 10:58 pm

[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]
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