A. .3423e2: This means 0.3423 times 10 raised to the power of 2 (which is 100). So, it's 0.3423 * 100 = 34.23, which is the same as our number. B. 3423e-2: This means 3423 times 10 raised to the power of -2 (which is 0.01). So, it's 3423 * 0.01 = 34.23, which is also the same as our number. C. .3423e-2: This means 0.3423 times 10 raised to the power of -2 (which is 0.01). So, it's 0.3423 * 0.01 = 0.003423, which is not the same as our number. D. 3423e2: This means 3423 times 10 raised to the power of 2 (which is 100). So, it's 3423 * 100 = 342300, which is not the same as our number. So, the options A and B are the ones that reflect the value 34.23. They show the number in a simpler way using scientific notation.

For representing decimal values both A and B must be written.

Answer A, B

A&B is correct

A. .3423e2 B. 3423e-2

A & B is thy answers

B,C is the correct answer!

A and B are correct answers.