How does the graph of y=-2(1/3)^x-2 compare to the graph of the parent function y=b^x?

Can someone answer this question? : )

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.