What is the difference written in scientific notation 1.3x10^6 - 6.8 x 10^5

Rewrite so the subject can be y in the formula d=m-y/y+n

In the triangle below, what is the length of the side opposite the 60° angle?

Marshall went to the state fair and bought 3 tickets. each ticket to the fair cost x dollars. after he bought the tickets, he had $3.25 left in change. write an expression that represents the amount of money, in dollars, that marshall had before he bought the tickets. n