I need help with both questions please help. It will be ok if you only answer 1

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

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16