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January 28, 2015

January 28, 2015

Posted by **Anonymous** on Wednesday, August 1, 2012 at 4:34pm.

A. 3.1 and 20

B. 4.1 and 15

C. 15

D. 3.1

- Trigonometry -
**Henry**, Thursday, August 2, 2012 at 7:01pmUse Law of Cosines:

cosB = (a^2+c^2-b^2)/2ac.

0.58779 = (256+c^2-196)/32c

0.58779 = (c^2+60)/32c

Cross multiply:

18.81c = c^2+60

c^2-18.81c+60 = 0.

c = 4.1,and 14.7. Use Quadratic Formula.

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