A car depreciates in value over time. The following formula represents the value of the car after years. How many years will it take for the car to be worth less than15000 ?

At a pizza shop 70% of the customers order a pizza 25% of the customers order a salad and 15% of the customers order both a pizza and a salad if s customer is chosen at random what is the probability that he or she orders either a pizza or a salad