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{SECT 0 {EXCHG {PARA 0 "" 0 "" {TEXT -1 1 "4" }}{PARA 0 "" 0 "" {TEXT 
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}{PARA 11 "" 1 "" {XPPMATH 20 "6#>%$de4G/-%%diffG6$-%\"yG6#%\"tGF,*&*(
F,\"\"\"F)F/,&\"\"%F/F)!\"\"F/F/,&F/F/F,F/F2" }}}{EXCHG {PARA 0 "> " 
0 "" {MPLTEXT 1 0 37 "sol := dsolve(\{de4, y(0) = 2\}, y(t));" }}
{PARA 11 "" 1 "" {XPPMATH 20 "6#>%$solG/-%\"yG6#%\"tG,$*&*$)-%$expGF(
\"\"%\"\"\"F1,.-F/6#,$F)F0F1F1F1*&F0F1F)F1F1*&\"\"'F1)F)\"\"#F1F1*&F0F
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1 0 34 "evaluated := eval(sol, y(t)=3.99);" }}{PARA 11 "" 1 "" 
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olve(evaluated, t);" }}{PARA 11 "" 1 "" {XPPMATH 20 "6&$!+PvEw5!\"*^$$
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{PARA 0 "" 0 "" {TEXT -1 45 "The solution first reaches the value 3.99
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