HELP PLEASE!! 13 Points Offered

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

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 value of x? enter your answer in the box.