<span>valid. She used a representative sample
</span>because she correctly found the average and 18,000 is a reasonable number to get for a the problem
A polygon is a 2-dimension figure....
<span>1.Take a measurement in feet.
</span>2.Multiply or divide your measurement by a conversion factor.<span>
</span>
1% is the answer because you have to bump it up two place and it is always the first number.
