Answer: 
, where n is a natural number.
Step-by-step explanation:
A series can be represented in a summation or sigma notation.
Greek capital letter, ∑ (sigma), is used to represent the sum.
For example: 
, where n is a natural number.
The given series : 1,4,9,16 which can be written as 
.
So , we can write it as
, where n is a natural number.
I think it’s b, if it not please let me know!
Answer:
the answer is -75% that mean 75% decrease
Answer:
5
Step-by-step explanation:
Because two times 5 equals ten
Well, if I were to come up with a real world situation that would involve finding the area of a circle then I think that a good real world situation would be finding the area of a circular sandpit.
