exam Maths Puzzle Numerical Ability

How do I find the domain of g(t)=log(t+2) and g(x)=ln(x-4)

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page 464, problem number 17. everyday you save two pennies more than you saved the day before. one the first day you saved one penny. how many pennies would you have after 100 days? A rectangle shelf is the square root of 440cm by the square root of 20cm. Find its area.