Every 5 and 1/2 cups of flour weighs 1 and 9/16 pounds. use a unit rate to show how you can determine if there are more than or less than 35 cups of flour in a 10 pound bag of flour

There are 18 female students and 16 male students in a class. which of the following expresses the ratio of female students to male students in simplest form? а) 10 b) 9 to 8 c) 8: 9 d)18/16