Here's a pattern to consider:
1+100=101
2+99=101
3+98=101
4+97=101
5+96=101
.....
This question relates to the discovery of Gauss, a mathematician. He found out that if you split 100 from 1-50 and 51-100, you could add them from each end to get a sum of 101. As there are 50 sets of addition, then the total is 50×101=5050
So, the sum of the first 100 positive integers is 5050.
Quick note
We can use a formula to find out the sum of an arithmetic series:

Where s is the sum of the series and n is the number of terms in the series. It works for the above problem.
Answer:
12
Step-by-step explanation:
diameter is just radius times 2
hope this helps!
please mark me brainliest! thanks!
83, the only number between 78 and 88 that has a 3 in the ones place.
Hope this helps!
If you are going by the graph you will know that it is part B and it is the accurate answer>.
D
because it is the only reasonable answer