Pleaseee help me solve the function

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

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.

Drag the tiles to the correct boxes to complete the pairs. label each function. as even , odd, or neither.