What is 8.5% as a decimal

What is the point-slope form of the equation for the line with a slope of -2 that passes through (1,4)?

Find the balance at the end of 4 years if 1000 is deposited at the rate of

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.