Evaluate the line integral by the two following methods. ∫ xy dx + x^2y^3 dy

C is counterclockwise around the triangle with vertices (0, 0), (1, 0), and (1, 4)

a. directly
b. using Green's Theorem

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.