Help please and ty ! (no its not 388)

It costs 4.25 for 1 pound of roast beef. how much will it cost to purchase 2.5 pounds of roast beef? round to nearest cent

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.