Compare the number 0.5 and 0.05. How many times 0.05 is 0.5? Explain how you know

Ineed with number 17 i don’t get it at alll

Evaluate the following expression 1/3^2

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.