I assume that you are talking about 2 integers
one of the integers must be negative while the other is positive
we can list integer pairs that multiply to -20:
-20 1
20 -1
-10 2
10 -2
5 -4
-5 4
now the only pair that when you add them together equals -8 is -10 and 2, so
-10 and 2 add to -8 and multiply to -20
Answer:
402.12
Step-by-step explanation:
C=2πr
=2·π·64
≈402.12386 --> 402.12
Sorry, I might be wrong
6 is the answer...............................
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Hope this helps u....!!