The tax rate as a percent, r, charge on an item can be determined using the formula c/p-1=r, which c is the final cost of the item and p is the price of the item before tax. Louise rewrites the equation to solve for the final cost of the item:c=p(1+r). What is the final cost of a $40 item after an 8% tax is applied?

Plz i want answer and i would appreciate it is is a b c or d

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?

Icould really use some with this question.