questions below:

N/ - Find the area of the region cut from the first quadrant by the curve r = 10(3 - sin 20) A= (Type an exact answer using it as needed.)Find the volume of the region between the planes x + y + 2z =5 and 3x + 3y + z = 15 in the first octant. The volume is (Type an integer or a simplified fraction.)Find the centroid of the triangular region cut from the rst quadrant by the line x + y = 4. What are the coordinates of the centroid? The centroid is the point D. (Type an ordered pair, using integers or fractions.)