Answer:
9
Step-by-step explanation:
Just dont even try with these use a calculator every time. even if you're confident
778.5 Million in Scientific Notation is..
7.785 × 
Answer:
9/5 or 1/2
Step-by-step explanation:
Check attachment
I hope this was helpful, Please mark as brainliest
Nancy is 9, tracy is 4, doug is 18, doug is the oldest.