It is: 6.0*10^1
60 million square miles in Scientific Notation = 6 x 107 miles2
It is: 6.0*10^-6 in scientific notation
8
It is 6.0*10^7 in scientific notation
58.34×60
60 = 6 * 101
60 = 6 x 10^1
600+60
6.0 x 101
In general, you cannot. If the number in scientific notation has not been rounded then express it is normal form and proceed from there.
228.1 = 2.281 x 102
Sometimes. Scientific notation is used to express very small or very large numbers. If the problem does not involve any such numbers then there is no need for scientific notation.