I need help I dont know about fractions

And employees salary increase by $4500 which represents a 15% raise what is the employees new salary

Arestaurant gives out a scratch-off card to every customer. the probability that a customer will win a prize from a scratch-off card is 25%. design and conduct a simulation using random numbers to find the experimental probability that a customer will need more than 3 cards in order to win a prize. justify the model for your simulation, and conduct at least 10 trials.

Triangle knm is what is true about the sides of knm