Answer:
The second data set.
Step-by-step explanation:
In Data set 1, mean is 4.8, the mode is 4.
In Data set 2, the mean is 5 and the mode is 5.
In Data set 3, the mean is 4.6 and the mode is 3.
Answer: 40?
Step-by-step explanation: I don't quite understand your question fully
Answer: 
Step-by-step explanation:

if it matters then simply further...
4 + \sqrt{4i} = 
Answer:
then what?
Step-by-step explanation:
do we have to find the angle?
all I know is every right triangle is equal to 90°