Answer:
I really hope this helped, this sentenced seemed the most logical to me.
Step-by-step explanation:
A study at Carnegie University showed that just listening to someone else talk on a phone cause a 37 percent drop in concentration among drivers.
Answer:

Step-by-step explanation:
Just like addition.
+2 +4 +6 +8 basically multiples of 2 or even numbers
It is 100x because 80x100=8,000
(-4)-4 could be some integers to subtract and get -8