Answer:
Final answer is choice B. 
Step-by-step explanation:
We need to factor the given expression 





Hence final answer is choice B. 
Answer:
6380
Step-by-step explanation:
You can use your calculator or knowing that 10^3 is 1000 so 6.38 x 1000= 6380.
The quotient of 78,600 and 12 is 6,550
Your bother is 2 1/2 years old
hope this helps :)