What is a typical size for the bottoms in the jar ? Is this an statistical question ?

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.

Can someone me with the property questions for 12 13 and 14 plz

Convert 3,200,000 to a scientific notation.