The length x of a side of a triangle is increasing at a rate of 3 in/s, the length y of another side is decreasing at a rate of 2 in/s and the contained angle between these two sides, &, is increasing at a rate of 0.05 rad/s. 丌 How fast is the area of the triangle changing when x =40 inches, y =50 inches and 0 = ? [note: you need 1 Heron's Formula, which says: Area = 6 ab sin(C), if you have a triangle with 2 known sides, a and b and is the included wwwww 2 angle created by these two sides.]