A middle school principal has 808080 keys on her key chain to distribute to staff on the first day of school. Of these 808080 keys, 606060 open classroom doors, 404040 open the door to the teachers' lounge, and 303030 open classroom doors and the teachers' lounge. Using this information, answer each of the following questions. Let CCC be the event that a randomly selected key opens a classroom and TTT be the event that a randomly selected key opens the teachers' lounge.

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

Joel wants to buy a new tablet computer fram a store having a 20% off sale on all tablets. the tablet he wants has an original cost of $190. he also wants to make sure he has enough money to pay the 5% sales tax. part one joel uses the incorect expression 0.95(190)(0.8) to calculate that the tablet will cost him a total of $144.40. describe his error and write the correct expression part two how much will joel pay for the tablet show your work if you answer this question correctly you will receive a prize of 99 points good luck

Can someone me with my math problem pls my teacher is on my back about this