exam Maths Puzzle Numerical Ability

When a number is subtracted from -7, the absolute value of the difference is more than 3. Use interval notation to express the set of all numbers that satisfy this condition.

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At the end of the year 2000, the population of rive town was growing exponentially according the following model. What was the population at the end of the year 2003? There is an arch above a door frame. The door frame is 9 feet wide and the arch is 3 feet high. Find the diameter of the circle?