The amount of mites that survive a new cancer treatment can be modeled by Y = 25(0.5)x Determine which number represents the decayed rate

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.

As a project for math class, two students devised a game in which 3 black marbles and 2 red marbles are put into a bag. first the players must decide who is playing black marbles and who is playing red marbles. then each player takes a turn at drawing a marble, noting the color, replacing the marble in the bag, and then drawing a second marble and noting the color before returning it to the bag. the point scheme for the game is detailed in the table below. point values for marble game black marble points red marble points both black: +2 points both red: +4 points different colors: –1 point different colors: –1 point both red: 0 points both black: 0 points

The regular price rounded to the nearest cent