How many solutions does the nonlinear system of equations graphed below have?

a . four
b . two
c . one
d . zero

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How do you find the distance of each number from the mean

Two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: what is the approximate distance, in feet, between the two poles? 6.93 feet 8.66 feet 12.32 feet 15.59 feet