I don’t know how to add intergers.How do I.it is too hard for me
1 answer:
A positive + A positive = A positive (1+2=3)
A negative + A negative = A negative (-1+(-2)=-3)
Adding a negative is like subtracting a positive (1 + (-2) = -1) this is equal to (1 - 2 = -1)
Adding a positive is like subtracting a negative (-1 + 2 = 1)
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that is your answer
C=2πr=2·π·13≈81.68141
C=81.68
