Please Helppp!!

An architect is making a deck in the shape below, where 1 unit = 1 foot. If one quart of deck stain can cover 8 square feet, how many quarts need purchased to stain the deck once?

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?

How many grams the dog will eat in 3 days?

Suppose y varies directly with x. write a direct variation equation that relates x and y. then find the value of y when x=12 y=7 when x=3