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October 23, 2014

October 23, 2014

Posted by **Kate** on Friday, April 27, 2012 at 3:21pm.

- math -
**Damon**, Friday, April 27, 2012 at 4:59pm8 8r 8r^2

so 8 r^2 = 20

r^2 = 20/8 = 5/2

r = (5/2)^.5

so

8 8(5/2)^.5 8(5/2) 8(5/2)^1.5 8(5/2)^2

fifth term = 8(25/4) = 50

Sn = 8(1-r^n)/(1-r)

S3 = 8 (1-(2.5)^1.5)/(1 -2.5^.5)

40.65

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