Which fraction is bigger 5/21 or 7/15

The jones farm has 24 cows that each produce 52 quarts of milk a day. how many quarts are produced each day altogether

Rena is building a 1: 180 scale model of a real castle. her model has a rectangular base that is 3 feet wide and 4 feet long what is the area of the base of the actual castle in square feet

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.