How do u solve 1/2x < -6

Three coins are flipped. what is the probability that there will be at least two tails?

Use set builder notation to represent the following set: { -3, -2, -1, 0}

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.