Question 590347
(1/2)bh = 4 ___ h = 8 / b


b^2 + h^2 = 4.7^2


substituting ___ b^2 + (64 / b^2) = 4.7^2


(b^2)^2 + 64 = 22.09 b^2 ___ (b^2)^2 - 22.09 b^2 + 64 = 0


use quadratic formula to find b^2, then find b (two of the four solutions will not work)


cos(C) = (b/2) / 4.7