Ben can address the weekly newsletters in 4 hours, Charlie can address them in 3 hours. How long would it take them to address the newsletters if they work together?

Scarlett stopped at a campground along the appalachian trail. the campground had a 12 acre area for tents, divided into 6 equal campsites. scarlett picked one of the sections to pitch her tent. which expression would give you the size of scarlett’s campsite? (more than one answer