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Variable M, t;
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Variable x, y;
Parameter p1, p2, p3;
Function y = p1/(1+p2*e^-p3*x);
Data;
0 32.06976744
2 72.8490566
4 164.2833333
6 276.5517241
8 411.9275362
10 485
12 522.9333
14 596.2778
16 709.3684
18 851.7143
20 925.8077
22 1007
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