Answer:
a. 9.56 × 10^3
Step-by-step explanation:
You want the sum (3.45 × 10^3)+ (6.11 ×10^3).
Distributive property
The distributive property works when adding numbers in scientific notation:
(3.45 × 10^3)+ (6.11 × 10^3) = (3.45 +6.11) × 10^3 = 9.56 × 10^3