Determine whether each sequence is a geometric sequence. If yes, then state the common ratio. 1, -4, 16, -64, ...

Determine the number of outcomes in the event. decide whether the event is a simple event or not. upper a computer is used to select randomly a number between 1 and 9 comma inclusive. event upper b is selecting a number greater than 4. event upper b has nothing outcome(s). is the event a simple event? (yes or no) because event upper b has (fewer than, exactly, more than) one outcome.

What is the missing step in this proof ?

Acircle has a circumference of 28.36 units what is the diameter of the circle