Please answer this question correctly and I will mark you as Brainliest! :)

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

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.