Quite an easy question for someone who knows scale factor :) I just need someone to do it so I can work on other things pls

How many different ways can you make change for $.50 using only nickels,dimes, and quarters?

Aman steps out of a plane at a height of 4,000m above the ground falls 2,000m very quickly and then opens his parachute and slowly falls the remaining 2000m to the ground what height above the ground would be the best choice for a reference point

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.