Mike is trying to pick out something to wear to school tomorrow. He is trying to decide between a red shirt, a white shirt, blue shirt and black shirt. He is also trying to decide between jeans and shorts. Lastly, he wants to know if he should wear a belt or a hat. Creat a tree diagrm. Then type all possisble outfits Mike can wear.

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.