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Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2

Anew landowner is interested in constructing a fence around the perimeter of her property. her property is 1,080√30 feet wide and 500√20 feet long. what is the perimeter of the property? (recall that the perimeter is the sum of each side of a shape or boundary). a 1,580√40 feet b. 5,320√5 feet c. 3,160√20 feet d. 10,640√5 feet