Qui peut m'aider a faire mon dm svp

The altitude at which we boil an egg affects how long it takes for the egg to achieve perfect hardness. it takes 198198 seconds to boil a perfect egg at the lowest place possible, the edge of the dead sea, which has an altitude of -418? 418 meters. the highest place possible is the summit of mount everest which has an altitude of 88488848 meters. it takes 209209 seconds to boil a perfect egg there. t(a)t(a) models the time (in seconds) it takes to boil a perfect egg at an altitude of aa meters. which number type is more appropriate for the domain of tt?