Kurt got home at 4:00. He did homework for 25 min and played outside for 20 min. Then he read a book for 15 min before dinner. What time was dinner?

You’re repairing a large rectangular aquarium. the final step is to cover the glass with a protective film. the front and back of the aquarium measure 4 meters by 2 meters, and the sides of the aquarium measure 3 meters by 2 meters. how many square meters of protective film do you need? ( )

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

How do you write something in scientific notation?