Ate three times as many chocolate bars as Teresa. Noah ate four more than twice the amount of chocolate bars as Teresa. Fuzzy is allergic to chocolate, so he did not eat any. They ate 69 chocolate
bars in total. How many chocolate bars did each person eat?

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.