Maggie made 3 stacks of wooden blocks. the first stack was 12 blocks tall. the second stack was 3 blocks taller than the first. the third stack was 7 blocks shorter than the second stack. how many blocks did maggie use in all?
a: 15
b: 8
c: 27
d: 35

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