A sample of a radioactive isotope had an initial mass of 330 mg in the year 1990 and decays exponentially over time. A measurement in the year 1995 found that the sample's mass had decayed to 160 mg. What would be the expected mass of the sample in the year 2003, to the nearest whole number?

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graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.

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