exam Maths Puzzle Numerical Ability

x2 � 16x + 63

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A charge account had a balance of $655 on June 1. A purchase of $98 was made on June 17, and a payment of $250 was made on June 4. If the ladder is 15 feet long and the height of the building is 12 feet the how far from the building should the ladder be so that the top of ladder touches the top of the building.