At best burgers, jack collected sales data on the type of side order served with each type of burger purchased for a week. jack serves a half pound of onion rings with every kind of burger. if jack sells 120 bacon cheeseburgers total, about how many pounds of onion rings will he serve with them? (round to nearest whole number) a) 15 pounds b) 18 pounds c) 30 pounds d) 54 pounds