The sale price of an item is four-fifths the original price of the item x

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)

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.