Will give brainliest to the best, and correct answer Identify the mode.

The mode of the data shown on the stem-and-leaf plot is
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We just started the introduction into circles and i have no idea how to do this.

Find the slope of the line passing through a pair of points

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.