Bill performed an experiment in which he spun a spinner divided into four equal parts. Each part had a different color. The results are shown below.
Color
Times Spun
11
red
blue
19
green
22
yellow
14
Based on the experiment above, predict the number of times the arrow will stop on the
yellow part of the spinner if he performs the experiment a total of 198 times.

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.