Question

What is (5.2 × 10^2) × (1.2 × 10^4)?    A. 6.4 × 10^8   B. 6.24 × 10^8   C. 6.4 × 10^6   D. 6.24 × 10^6

Answer 1

$\boxed{(5.2).10^2*(1.2).10^4=6.24*10^6}$

Answer 2

Question :
What is (5.2 × 10^2) × (1.2 × 10^4)?   
A. 6.4 × 10^8   B. 6.24 × 10^8   C. 6.4 × 10^6   D. 6.24 × 10^6
Answer :
$(5.2 \times 10^{2}) \times (1.2 \times 10^{4})$

$= 6.24 \times 10^{6}$


Note :
Remember this :
$a^{m} \times a^{n} = a^{m+n}$