The elevator in the washington monument takes 75 seconds to travel 500 feet to the top floor. what is the speed the elevator in miles per hour? give your answer to two significant digits.

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

What is the value of the expression below? 148+(-6)| + |– 35= 7|

Solve x+3y=6 and 4x-6y=6 by elimination . show work !