What is the standard notation of 2.934x10^8

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

Find all the angles that satisfy the equation cos(θ)=32

In 2000 the average price of a football ticket was $48.28. during the next 4 years, the proce increased an average of 6% each year.a) write a model giving the average price (p), in dollars, of a ticket (t) in years after 2000.b) graph the model. estimate the year when the average ticket price was about $60