(1.2 × 10⁹ )× (4 × 10⁻³)= A)3 × 10⁶ B)3 × 10⁵ C)3 × 10¹⁰ D)3 × 10¹¹ E)3 × 10¹²

Name: (1.2 × 10 9 )× (4 × 10 − 3 )= A)3 × 10 6 B)3 × 10 5 C)3 × 10 10 D)3 × 10 11 E)3 × 10 12
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Question

Quizplus · Accepted Answer

To multiply scientific notation, we first multiply the two numbers and then add the exponents. 
(1.2 × 10^19) × (4 × 10^-13) = 4.8 × 10^6
The exponent is the sum of exponents (19 + (-13) = 6)
Therefore, the answer is 3 × 10^111. The correct option is D.

(1.2 × 109 )× (4 × 10−3)=

(1.2 × 10⁹ )× (4 × 10⁻³)=