The computer store is having a sale on laptops . each laptop is being sold for 15% off the regular price . avery wants to buy a laptop that is regularly $800 . if a 5% sales tax is applied to the sale price of the laptop, what is the final amount avery will pay ? plz show work

The table below shows the approximate masses of a dust particle and a grain of pollen. dust particle 0.000000778 g grain of pollen 0.00000000155 g the mass of a dust particle can be estimated and written in the form a × 10^b, where a = 8 and b = the mass of a grain of pollen can be estimated and written in the form a × 10^b, where a = 2 and b = based on the estimates, the mass of a dust particle is approximately blank times larger than the mass of a grain of pollen.