SOLUTION: dear tutor, I am having a slight uissue witht his problem and understand none of it so here is the problem (may I ask you 2) 1. C=8/5 X 3.14mm 2. A=1962.5cm^2

Algebra ->  Algebra  -> Circles -> SOLUTION: dear tutor, I am having a slight uissue witht his problem and understand none of it so here is the problem (may I ask you 2) 1. C=8/5 X 3.14mm 2. A=1962.5cm^2       Log On

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Question 189675: dear tutor,
I am having a slight uissue witht his problem and understand none of it so here is the problem (may I ask you 2)

1. C=8/5 X 3.14mm 2. A=1962.5cm^2 it says use pi but the first one has pi the second one dosent please help! Thanks!
Answer by Alan3354(21583) About Me  (Show Source):
You can put this solution on YOUR website!
1. C=8/5 X 3.14mm 2. A=1962.5cm^2 it says use pi but the first one has pi the second one dosent please help! Thanks!
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I think the #1 is asking for the Circumference if the diameter is 8/5 mm, or 1.6 mm.
C = pi%2Ad
C = 1.6*3.14159
C = ~ 5.0265 mm
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The 2nd is the Area
A = pi%2Ar%5E2
R = sqrt%28A%2Fpi%29
r = ~ 24.99 cm (25 if you use 3.14 for pi)