Answer:
a. 
b. = 40 km/ million years
Explanation:
The computation is shown below;
According to the question, Data provided in the question
Average speed = 4.0 cm / per year
Distance move in 1 second at this speed
Based on the above information
a. For distance move in 1 second is
As we know that

b. For speed per kilometer per million years is

= 40 km/ million years
I believe the answer is true.
I hope this helps :)
Answer:
what is the hunting age? i've never heard of it