What is the scientific notation for 72.4

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

The vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation

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