5. Which of the following statements is NOT true regarding an expression written in scientific notation in the form of a x 10^n ?

A.)The value of "A" must be greater than or equal to 1 and smaller than 10.

B.)The value of "N" must be an integer.

C.)Doubling "N" results in a doubling of the value of the expression.

D.)Doubling "A" results in a doubling of the value of the expression.

Please help.
I'm not sure what the answer is.
Thank you.

To find the answer, let's analyze each statement.

Statement A says that the value of "A" must be greater than or equal to 1 and smaller than 10. In scientific notation, the value "A" should indeed be greater than or equal to 1 and smaller than 10 to represent a number between 1 and 10. This statement is true.

Statement B says that the value of "N" must be an integer. In scientific notation, "N" represents the number of times the decimal point is moved to the right or left. It can be a positive or negative integer. This statement is true.

Statement C says that doubling "N" results in a doubling of the value of the expression. Doubling "N" means multiplying it by 2. Since "N" represents the number of times the decimal point is moved, doubling "N" results in shifting the decimal point by a larger number of places. Consequently, the value of the expression is multiplied or divided by a power of 10, not doubled. This statement is false.

Statement D says that doubling "A" results in a doubling of the value of the expression. This statement is true. When "A" is doubled, the value of the expression will also double since it is multiplied by a constant factor.

Therefore, the answer is option C. Doubling "N" does not result in a doubling of the value of the expression.