Question 1161282
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{{{x^2/7}}} + 55 = 250


{{{x^2/7}}} = 250 - 55 = 195

{{{x^2}}} = 195*7 = 1365

x = {{{sqrt(1365)}}} = 36.946.


It is half of the distance between the poles;  

so the whole distance between poles is 2*36.946 = 73.89 feet (rounded as requested).    <U>ANSWER</U>
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Solved.