What is the correct format for reference initials?

Determining effects of stock splits oracle corp has had the following stock splits since its inception. effective date split amount october 12, 2000 2 for 1 january 18, 2000 2 for 1 february 26, 1999 3 for 2 august 15, 1997 3 for 2 april 16, 1996 3 for 2 february 22, 1995 3 for 2 november 8, 1993 2 for 1 june 16,1989 2 for 1 december 21, 1987 2 for 1 march 9, 1987 2 for 1 a. if the par value of oracle shares was originally $2, what would oracle corp. report as par value per share on its 2015 balance sheet? compute the revised par value after each stock split. round answers to three decimal places.

What is the cause of smoky exhaust?

The answer here, x=7, is not in the interval that you selected in the previous part. what is wrong with the work shown above?