A. -3
B. -1/3
C. 1/3
D. 3

Aquantity with an initial value of 3900 decays exponentially at a rate of 35% every hour. what is the value of the quantity after 0.5 days, to the nearest hundredth?

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.