Question 1151712
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<pre>

The centripetal acceleration is  a = {{{v^2/R}}}.


To answer the problem's question, you should solve this inequality


    {{{v^2/175}}} <= 28.


    {{{v^2}}} <= 28*175 = 4900,

    
     v <= {{{sqrt(4900)}}} = 70 ft/s.    <U>ANSWER</U>
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