If z varies directly with the product of x and y (z=kxy), then z is said to vary jointly with x and ythe area of a triangle varies jointly with its base and height. what is the constant variation?

During each minute of a comedy show, carlin laughs 55 times. carlin watches 33 comedy shows every day, and each show is 40 minutes long. how many times does carlin laugh every day due to the comedy shows?