Choose the correct graph of the function. y = –2(2^x)

Factor this polynomial completely x^2-64

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.

Identify the number as a rational or irrational. explain. 127