Which of the following models a geometric sequence. Select all that apply.
1) The amount of cell phone users increases by 33% every year.
2) Amount of cakes in a bake sale increases by 3 each year the fundraiser is held.
3) Uranium loses half of its weight every 415 years.
4) A family of rabbits doubles in size every 3 months.
5) A car drives at a constant speed of 58 mph.
6) The number of students in a school increases by 122 each year.
7) The number of pieces of chalk in a classroom decreases by 10 throughout the school year.