exam Maths Puzzle Numerical Ability

For the period 1999-2004,the maximum depth of the Dead Sea decreased by 9.9 feet.The maximum depth in 2004 was 1036.7 feet.What was the maximum depth in 1999?

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classify the angle 101degree as acute, right, obtuse, or straight.. I have a world problem, not sure if I came up with the right answer. Could you help please. The reciprocal of a number plus the reciprocal of twice the number equals 1/2. Find the number. I have x+2x=1/2 x=1/6 Is this right?