Any helpers? Need help asap

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

If myesha works overtime, she gets paid "time and a half" for every hour she works. in other words, for every hour over 40 hours myesha works each week, she gets her hourly pay plus half her hourly pay. what is myesha's pay per hour when she works overtime?

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?