Arectangle has an area of 12 square feet and a length of 5 feet. what is its width?

Need on this one asap im almost done with this subject

Student price tickets to a movie are $1 and non student tickets are $2. 350 tickets are sold and the total amount made is $450. how many non student tickets were sold ? a) 100 b) 150 c) 200 d)250

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?