N=2p. Blah blah not part of the answer
Answer: A rational number is any value that can be expressed as a ratio of two integers. An irrational number is any value that cannot be expressed as a ratio of two integers.
Rational 4 and 1/4
Irrational π and √3
Scientific notation is used when a number is really big (example: 11200000000) or really small (example: .000000000002). In this case three of your situations would have really big numbers. That means the answer would be the speed of a car because that would a normal sized number.