P. s. 158class 4-408name: teutonproblem of the day chapter 5objective: students will be able to find the common multiples of two numbers and solve problems involvingnumber patternsstandard: 4.0a. b.4 determine whether a given number from 1-100 is a multiple of a single digit numberproblem: tori tikes to eat vanilla ice cream every 3 days and chocolate ice cream every odasduring one month she ate both of them on the 3rd day of the month. tori figure outthe other dates of the month that she will eat both vanilla and chocolate ice cream on the sameday. work and answer

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.