Even Odds.
Let E stand for the set of all even natural numbers (so E = {2,4,6,8….} and O stand for the set of odd natural numbers ( O = {1, 3, 5, 7,….}. Show that the sets E and O have the same cardinality by describing an explicit one-to-one correspondence between the two sets.

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this 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.

Ineed here’s a picture of the question