Answer:
9.2 × 10⁷
Step-by-step explanation:
Exponent Rule:
[tex]\boxed{a^{b+c}=a^b \cdot a^c}[/tex]
[tex]\begin{aligned}(1.3 \times 10^8)- (3.8 \times 10^7)&=(1.3 \times 10^{7+1}) - (3.8 \times 10^{7})\\&=(1.3 \times 10^7 \times 10^1) - (3.8 \times 10^{7})\\&=(1.3 \times 10^1 \times 10^{7}) - (3.8 \times 10^{7})\\&=(13\times 10^{7}) - (3.8 \times 10^{7})\\&=(13-3.8) \times 10^{7}\\&=9.2 \times 10^{7}\end{aligned}}[/tex]
