Answer:
Formula for the SA (Surface Area) is 2πrh+2πr^2.
Replace the values and you get answer of 251.999570694 = 252pi
No it is not, the solution would need to be (2,-4) in order to satisfy the equation y = -2x -- like so -4 = -2(2)
-4 = -4, otherwise the equation won't be satisfied.
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