Answer:
The sum is 1575.
Step-by-step explanation:
Consider the provided information.
It is given that positive integers smaller than 1000 and that can be written in the form 
Where n is integer that means the value of n can be a positive number or a negative number.
For n = 0

For n=-1

For n=-2

For n = -3 the obtained number is not an integer.
Now consider the positive value of n.
For n=1

For n=2

For n=3

For n=4 the obtained number is greater than 1000.
Now add all the numbers.

Hence, the sum is 1575.
Bryan spends T=15x
320 divided by 15 is and average of $21 per week
A human blinks 6,250,000 times a year.
A seal blinks 1,010 times a year.
The mean is just the arithmetic average...
Sample A=8.1
Sample B=8.11
Both Samples=8.105
So Ryan would be closer to being correct given either of or both samples.