21.   Frank Drake has come up with a mathematical formula to help scientists determine the number of civilizations that might be able and willing to talk to earthlings.

22.   How well Ford Chiba and Ford Tohnichi fare could help determine the number of other Japanese dealers who will sell American cars.

23.   It insisted on determining the number of stevedores in each work gang used for loading and unloading cargo.

24.   It is impossible to determine the number of Jews then in Portugal.

25.   Last week, the City Council took steps to try to determine the number of illegal signs in the city and ordered that an inventory be taken.

26.   Officials take pictures from a helicopter that flies along the sides of the Mall and then, using a grid, determine the number of people per square foot.

27.   One is a simple head count to determine the number of seats each state has in the House of Representatives.

28.   Pilson said the numbers are determined by the matchups, quality of play, time of day, and competition on the other networks.

29.   Pods on soybean plans are beginning to fill with beans, the most important step in determining the number of bushels from each acre.

30.   People could play for pennies and the daily three-digit number was determined by the total amount of money bet at a specified horse racetrack that day.