Evaluate the integral ∮cf⋅dr for f=(3x2y)i+(2x2−3xy2)j on the curve c consisting of the x-axis from x=0 to x=2, the arc of the circle x2+y2=4 up to the line y=x, and the line y=xdown to the origin.

Acertain drug is made from only two ingredients: compound a and compound b. there are 3 millimeters of compound a used for every 4 millimeters of compound b. if a chemist wants to make 693 milliliters of the drug, how many milliliters of compound a are needed?