Question

To determine whether a number is written in scientific notation, what test can you apply to the first factor, and what test can you apply to the second factor?

Answer 1

(A) Is the first factor of this form?

[minus sign] <digit> [<decimal point> [<digit> ...]]

where square brackets show optional items, and "..." shows items that repeat as much as you may like.

(B) Is the second factor of this form?

10^<integer>