Question

Simplify (3.8 × 10−9) − (7.4 × 10−8). Write the final answer in scientific notation.

Answer 1

Answer: -7.02x10⁻⁸

Explanation:

(3.8x10⁻⁹)-(7,4x10⁻⁸)=

10⁻⁹(3.8x10⁻⁹⁻⁽⁻⁹⁾-7.4x10⁻⁸⁻⁽⁻⁹⁾=

10⁻⁹(3.8x10⁻⁹⁺⁹-7.4x10⁻⁸⁺⁹)=

10⁻⁹(3.8x10⁰-7.4x10¹)=

10⁻⁹(3.8x1-7,4x10)=

10⁻⁹(3.8-74)=

-70.2x10⁻⁹=

-7.02x10⁻⁸

Answer 2

7.02 x 10-8 is in scientific notation