Consider the box-and-whisker plot.

A box and whisker plot. The number line ranges from 0 to 70. The left whisker begins at about 0. The box ranges from about 15 to 50. The middle line in the box is at about 25. The right whisker extends to about 70.

About what percent of the data is less than 15?

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.