An amoeba divides to form two amoebas after one hour . one hour later each of the two amoebas divides to form two more. every hour each amoeba divides to form two more

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30

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.

Will give a: 122 b: 90 c: 48 d: 180