The half-life of Strontium-90 is 28.79 years. If a sample contains 490 mg, how many mg will remain after 180 years?

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A: I am attaching image so that you understand each and every step.

Q: 8. [ V4 – x? xdx

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A: dx+2xdyy=2x2y2dy dxdy+2xy=2x2y21x2dxdy+2yx=2y2.......1equlet 1x=v differentiate with respect to y…

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A: The Solution is given below

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Q: Find all critical points of the function g (0) = sin² (120). Express your answer in terms of . (Use…

A: This question is based on general solution of Sine function.