Alena wants 50 people at her birthday party. Due to Corona Virus, she can only have 40% of that total. How many people is she allowed to have at her birthday party? please help i need this asap and its worth 10 points

You are cycling around europe with friends. a cycling festival is starting soon in barcelona. it will take 4.5 hours to cycle there. how many minutes in total is this?

Why do interests rates on loans to be lower in a weak economy than in a strong one

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.