Question

Ello beautifuls! ;-*
I'll fan & medal to who ever assists me. <33

Jill arranges quarters in stacks of increasing powers of 2, starting with the zeroth power (20). If she ends up with six stacks, how many coins has she used?

A.) 16
B.) 36
C.) 63
D.) 96
E.) 101

*Bows* Arigato! ^-^

Answer 1

(20^0)

Answer 2

Ohh it's Miku!! :D

Answer 3

first stack is 2^0
second stack is 2^1
third stack is 2^2
fourth stack is 2^3
fifth stack is 2^4
sixth stack is 2^5

with me so far? see how the exponent increases each time by 1?

Answer 4

now, to find the total number of coins, we need to add up 2^0+2^1+2^2+2^3+2^4+2^5