Answer:
C
Step-by-step explanation:
i took the test
For the first 60 positive integers, a = 1, n = 60, l = 60.
Sn = n/2(a + l)
s = 60/2(1 + 60) = 30(61)
For the next 60 positive integer, a = 61, n = 60, l = 120
Sum = 60/2(61 + 120) = 30(61 + 120) = 30(61) + 30(120) = s + 3600
Sum of first 120 positive integers = s + s + 3600 = 2s + 3600
I think it is 2,504.
when you round 2,505 it comes out to 2,510.
Octagons have 8 lines of symmetry
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Answer:
48
Step-by-step explanation:
