In a small theatre of 21 employees, 8 will be chosen as security, 6 will be chosen to serve food and drinks, and the rest will be ushers. In how many ways can you do this?

Working on itts i’m going to need you to me as i go along 1-5

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

The length of a shadow of the building is 36m. the length of the pole, which is perpendicular to the ground, is 1.9m. the length of the pole's shadow is 1.52m. what is the height of the building?