Jessica saved a total of $58.50 to spend on school supplies. she wants to buy one backpack for $36.25 and she wants to spend the rest on folders with paper. each folder filled with paper costs $3.89. part a: select the inequality that shows how many folders filled with paper (x) jessica can buy. $36.25 + $3.89x ≤ $58.50 $36.25x + $3.89x ≤ $58.50 $36.25 + $3.89x ≥ $58.50 $36.25x + $3.89 ≥ $58.50

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.