31. Make Sense and Persevere A peanut company ships its product in a carton that weighs 20 oz
when empty. Twenty bags of peanuts are
shipped in each carton. The acceptable weight
for one bag of peanuts is between 30.5 oz and
33.5 oz, inclusive. If a carton weighs too much
or too little, it is opened for inspection. Write
and solve a compound inequality to determine
x, the weights of cartons that are opened for
inspection.