book Maths Puzzle Numerical Ability

Find the vertex and focus of the Parabola whose equation is 4(y-2) = (x-4) ^2.

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book Other Question

Find a polynomial that represents the area of a circle whose radius is b+1 meters. Using the value of pi=3.14, what would be the radius if the area was to equate 4pi square meters? 1/5(x+4)-8=3/5x-2

1/5 is 1 over 5, it's a fraction just in case you didnt know. thanks a lot!!