The reading d1 of the odometer at the beginning of a car trip was 2470 km. The reading d2 at the end of the trip was 4631 km. What is delta-d?

8644

Explanation:

there is a difference of 2161 between the numbers. If you multiply the difference by 4, you would get the answer.

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.