Pls help i dont wanna fail :(

Acity plans to build a new rectangular-shaped park. the perimeter of the park will be 940 meters. the width of the park will be 300 meters. what will be the length, in meters, of the new park?

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?