A game is played in which the player must guess the code on a combination lock. The code consists of five numbers from 1 to 9, not necessarily distinct, which must be entered in the correct order. If the player guesses the code correctly, they win 3000 dollars. Otherwise, they lose $1. What is the probability of winning this game?

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.