Mathematics, 09.11.2021 23:10 hdjsjfjruejchhehd

The rate at which a tsunami approaches the coast of North Carolina is modeled by r=439t where r is rate and t is time. If the tsunami is approaching at 150 km/hr, how much time do we have to prepare?

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The rate at which a tsunami approaches the coast of North Carolina is modeled by r=439t where r is r...