What number become double when you divide by itself and become its half when you multiply it by itself

The graph below shows the amount of money left in the school’s desk fund, f, after d desks have been purchased. for each new desk that is purchased, by how much does the amount of money left in the school’s desk fund decrease?

You got a job selling magazines door-to-door. you are paid $100 per day plus $1.50 for each magazine you sell. which recursive formula models this situation?

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?