What will be the total watt demand for the living area of this Dwelling?

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How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)

Rewrite the following quadratic functions in intercept or factored form. show your work. y = x^2 + 7x + 10