Answer:
subscripts identify different instances of objects that have a similar meaning or definition
Step-by-step explanation:
You apparently are interested in the meaning of the subscript N in the explicit formula ...
Here, it is used to identify different terms of a sequence. When a value is substituted for N, it replaces all instances of N. Using your example, the first three values of 
are ...
So, if you're asked to find the 20th term of the sequence, you put 20 where N is, then do the arithmetic.
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Subscripts are also used to identify elements of a matrix or coordinates in multiple dimensions. For this purpose, there may be 2 (or more) subscripts, whose order has meaning. The subscripts 24, for example, in 
refer to row 2, column 4 of a matrix named A. That is, the subscripts are in row, column order.
In short, subscripts are used to identify different instances of similar objects.
Answer:
debit
Step-by-step explanation:
I’m really really sorry i can’t ask another question until i answer somebody’s questions.
Answer:
Here, I did the assignment. I wish you good luck!
If you can find your way through all the smoke of the definition,
you find that an increase of 10 times the intensity is an increase
of 10 dB.
Next, if you can find your way over, under, around, and through
all the speeds and distances of the vehicles, you'll find that you
don't need them. Right in the middle of the pile, it says "intensity
10 times that of ...". That right there tells you that the sound of
the truck is 10 dB louder than the sound of the car.
So the car is 70 dB (asked for, and then given), and the truck is 80 dB.
