A car weighs about 4000 pounds which comparison is true

Me answer number 3plz explain how you do it

Mary had at least an 80% on her test write an inequality to represent this situation

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.