Ava is raising money for a school trip by selling bags of chips and candy bars. The price of each bag of chips is $1.75 and the price of each candy bar is $1. Yesterday Ava made $26 from selling a total of 17 bags of chips and candy bars. If b = 12 and c = 5, what do the answers mean in the context of the problem?

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.