Final answer:
Yes, (ab x 10ᵐ n) is always a number in scientific notation.
Step-by-step explanation:
In scientific notation, a number is expressed as N x 10n, where N is greater than or equal to 1 and less than 10, and n is an integer. So, in the expression (ab x 10m n), both ab and 10m n are numbers, and when multiplied together, they will result in another number. Therefore, (ab x 10m n) is always a number in scientific notation.