The sum of the first n natural numbers and 0=
n*(n+1)/2
Answer:
<u>D</u>
Step-by-step explanation:
The interval notation for the graph :
It is a parallelogram!
Also you haven't really put any other info...
Answer:
you need 8 bins because 150/20 is 7.5 but you can't have half a bin and you need somewhere to put the other books