Answer:
1.08 × 10^11
Step-by-step explanation:
Subtract: (1.8*10^11)-(7.2*10^10)
26 divided by 2 is 13
13 divided by 2 is 6.5
6.5 + 6.5 = 13
42.194988
There are 42.194988 km in 1 marathon
answer to the question is A