Final answer:
The price per acre of Alaska is $0.019.
Step-by-step explanation:
To find the price per acre, we divide the total purchase price by the total area in acres. The total purchase price of Alaska was $7.2 million, and the total area is 0.378 billion acres.
To convert billion acres to regular acres, we multiply by 1 billion, so 0.378 billion acres is equal to 0.378 * 1 billion = 378 million acres.
Now we can calculate the price per acre by dividing the total purchase price by the total area in acres: $7.2 million / 378 million acres = $0.019 per acre.
Therefore, the price per acre of Alaska is $0.019.