30 points: there are 80 seats on a train. 25% of the seats are empty. how many empty seats are there on the train?

Ebuka's monthly rent is $750. if ebuka pays the rent late, his landlord charges 4% interest per week that the payment is late. write a function that gives the total cost r(t), in dollars, of ebuka's rent if he pays it t weeks late.

What three-dimensional solid have 6 rectangular faces, 2 equal bases that are not rectangles and 18 edges

Julia bought 7 hats a week later half of all her hats were destroyed in a fire. there are now only 12 hats left with how many did she start