Answer
$$153,600{\text{ }}{{\text{m}}^2}$$
Work Step by Step
$$\eqalign{
& b = {\text{84}}0.{\text{6 m}},c = {\text{715}}.{\text{9 m}},A = {\text{149}}.{\text{3}}^\circ \cr
& {\text{Find the area of the triangle using the formula: }}Area = \frac{1}{2}bc\sin A \cr
& Area = \frac{1}{2}\left( {{\text{84}}0.{\text{6 m}}} \right)\left( {{\text{715}}.{\text{9 m}}} \right)\sin \left( {{\text{149}}.{\text{3}}^\circ } \right) \cr
& {\text{Using a calculator}} \cr
& Area \approx 153,600{\text{ }}{{\text{m}}^2} \cr} $$
