How to get answer by Mimiwhatsup (In Decimal Form):

Answer in Fraction Form: 
That is called the Origin , where the number 0 is.
Answer:
to find the adverage you have to add the times together then divide them by 2 so 2 + 1.5 = 3.5/2= 1.75
Step-by-step explanation:
Find

by plugging in 1 into n:

Find

by plugging in 11 into n:


Now to find the sum your formula is:


Now plug that into the formula


Hope that helps