Hydrogen has a prominent emission line at 486 nm. It was measured for a moving astronomical object at 484 nm. Is the object moving towards or away from the observer and how fast?

F(x) = x2 − 9, and g(x) = x − 3 f(x) = x2 − 4x + 3, and g(x) = x − 3 f(x) = x2 + 4x − 5, and g(x) = x − 1 f(x) = x2 − 16, and g(x) = x − 4 h(x) = x + 5 arrowright h(x) = x + 3 arrowright h(x) = x + 4 arrowright h(x) = x − 1 arrowright

7. the area of the playing surface at the olympic stadium in beijing isof a hectare. what area will it occupy on a plan drawn to a scaleof 1: 500?

True or false? the sum of the differences (% - 7) is never zero for any distribution consisting of n observations.