Your answer would be b i'm pretty sure
Y= 40 explanation don’t want to just trust me it’s 40
Distance Formula: 
Apply the points: 
Solve: 
Since the square root of 218 cannot be simplified, the answer is

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So.. 2.86 - 2.79 is the amount in decrease or 0.07
so.. if we take 2.86 as the 100%, how much is 0.07 of that in percentage?
well

solve for "x"