Write the number of seconds in scientific notation.

Express the given information in Scientific notation (standard form) and then arrange them in ascending order of their size.

Express the given information in Scientific notation and then arrange them in descending order of their size.

In our own planet Earth, 361,419,000 square kilometre of area is covered with water and 148,647,000 square kilometre of area is covered by land. Find the approximate ratio of area covered with water to area covered by land by converting these numbers into scientific notation.

If 2^{n + 2} – 2^{n + 1} + 2ⁿ = c × 2ⁿ, find the value of c.