The massless spring of a spring gun has a force constant k = 0.09 n/cm. when the gun is aimed vertically, a 29 g projectile is shot to a height of 5.0 m above the end of the expanded spring. how much was the spring compressed initially? (find d, in meters.)

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