Final answer:
Secretary of State William H. Seward purchased Alaska from Russia for $7.2 million in 1867.
Step-by-step explanation:
The person who purchased Alaska from Russia was Secretary of State William H. Seward. The United States purchased Alaska from Russia on October 18, 1867, for the amount of $7.2 million. The purchase of Alaska, known as the Alaska Purchase, was widely criticized at the time but has since been seen as a valuable acquisition for its rich natural resources.
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