If I’m correct, then the answer is D. Someone please correct me if I’m wrong.
Answer:

Step-by-step explanation:
The angle formed by
and the angle marked as
are co-interior angles and therefore must be supplementary (add up to 180 degrees).
Therefore, we have:

Answer:
The records can be select in 332,640 ways.
Step-by-step explanation:
Consider the provided information.
There are 11 records to select from and a disc jokey can play 6 records.
Here, we need to find the number of permutation of n = 11 records taken r = 6 at a time.
Use the formula: 
Substitute the respective values in the above formula.




Hence, the records can be select in 332,640 ways.
The width is 48 and the length is 144. I think