Answer:
I think that the answer is A.
40/1 is the same 80/2 120/3 160/4
Answer:
#1. 2 and 16
#2. 12
Step-by-step explanation:
You can group first two conjunctions and second two:

.
In first brackets you have common

and in second brackets common is 5:

.
45.3297 rounded to the nearest tenth is 45.3
3 is in the tenths place, so you look at the number to the right of it. If that number is 5 or more, you round up. If the number is 4 or less, you round down. So you round 45.3297 down to 45.3