Question

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Answer 1

this one?

Answer 2

\(\bf x^2+y^2=3600\) is a circle's equation
the radius is \(\bf 3600=r^2\implies \sqrt{3600}=r\implies 60=r\)

so, the broadcasting is transmitting in a circular area
do they Martinez get the signal?

well.. they'd get the signal is they're WITHIN the circular area covered by the signal

Answer 3

so recall, we know the radius is 60 miles long

Answer 4

so, what you're really asked is

Answer 5

well..notice, is just a right triangle, use the pythagorean theorem \(\Large c^2=a^2+b^2\implies c=\sqrt{a^2+b^2}\)