What are intervals in back to back stem and leaf plots (an interval of 10 example)

Rena is building a 1: 180 scale model of a real castle. her model has a rectangular base that is 3 feet wide and 4 feet long what is the area of the base of the actual castle in square feet

Marcus and cody both leave the park at the same time, but in opposite directions. if cody travels 6 mph faster than marcus and after 4 hours they are 64 miles apart, how fast is each traveling? solve using rare times time = distance.

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?