Arithmetic or geometric 18,13,8

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

Need ! the total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?

Acd that is originally priced at $15.85 red-tagged for the sale. what is the sale price of the cd