Question

Which shows the expression below in simplified form?

(8.5 × 10^-4) - (2.1 × 10^-6)
A. 8.479 × 10^-5
B. 8.479 × 10^-4
C. 8.29 × 10^-4
D. 8.29 × 10^-5

Answer 1

To simplify the expression (8.5 × 10^-4) - (2.1 × 10^-6), subtract the exponents and subtract the coefficients to get 6.4 × 10^-4.

Step-by-step explanation:

To simplify the expression (8.5 × 10-4) - (2.1 × 10-6), we subtract the exponents and subtract the coefficients:

(8.5 - 2.1) × 10-4 = 6.4 × 10-4

The correct answer is 6.4 × 10-4 (option C).