In 2015, there were about 22 million teenagers (aged 13-16) in the United States. They each sent an average of 900 text messages did all of the teenagers in the United States send each month? Express your answer using scientific notation.

Acircle is represented by the equation below: (x − 5)2 + (y + 7)2 = 49 which statement is true? the circle is centered at (−5, 7) and has a radius of 7. the circle is centered at (5, −7) and has a diameter of 7. the circle is centered at (5, −7) and has a radius of 7. the circle is centered at (−5, 7) and has a diameter of 7