Label the center of your circle, “a.” draw two different radii and label them. next, draw a diameter and label it “diameter.” tell what is the relationship between the radius and the diameter? draw a different chord that is not a diameter and label it “chord.” compare the length of the chord with the length of the diameter. which one is longer? what is the longest chord that can be drawn across the inside of a circle?

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.