Answer: A. The first one
Step-by-step explanation:
Answer:5(3+n)
Step-by-step explanation:
A unit rate simply means how many of one type of units you get per 1 other type of unit.
Examples of that:

This is rate of fluid flow of some pump for example. It pumps 300 liters every second.
Other example:

This is example for speed. Somebody is moving at 50 kilometers per hour (every hour he travels 50 kilometers)
Answer:
i dont think b is correct because x(x)(x) would be x ^3
Step-by-step explanation:
if you put in 5 as an example then you would see that 5(5)(5) is actually 125 and not 15 like 3 times 5
3.69/10 = .369 x 12 = 4.428, so around 4.43