**TI83F*

Created by TI-Smartview CE 5.4.0.1858     º  © C11BACDP  © § PYCD*11_Indice_TleTechno_Bac_sujetD_corrige.py from math import*
def duree(seuil):
    t=0
    while(1370*exp(-0.065*t+30)>=seuil):
        t=t+1
    return(t)
f4