The population of a city currently 45,000 and is declining at a rate of 2% each year. Give a formula for determining the total population after a period of t years.

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?

Arestaurant chef made 1 1/2 jars of pasta sauce. each serving of pasta requires 1/2 of a jar of sauce. how many servings of pasta will the chef be able to prepare using the sauce?

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?