The half-life of radium is 1690 years. If 20 grams are present now, how much will be present in 140 years? grams (Do not round until the final answer. Then round to the nearest thousandth as needed.)

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A: Find the domain of the logarithmic function in interval notation:

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Q: 2) If A₁ = [9] B₁ = [5] 4₂ = [4], B₂ = [] find the location of the pole.

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A: To simplify the following expression.

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Q: Which of the following options shows the complex number in polar form? O j-1 O 1/180° 01/0 0 14 2

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