If m||n, what is the value of x° in the figure below?

Select one:
A. 40o
B. 60o
C. 80o
D. 100o
E. 120o

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One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

Acircle has a circumference of 7.850 units. what is its radius?