Complete the following item based on the given information. The volume of a box( V ) varies directly with its length( l ) and has a proportionality constant k = 24. If the girth of a box is 20 inches, what is its height? (Note: girth is the perimeter of the side formed by the width and height) List your answers in numerical order. inches or inches

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.