Kim needs $100 to buy a new bike she decides to save her money the first week she saves $1.00 the second week she saves $2.00 the third week she saves $8.00 if kim continues saving with this pattern which week will she have enough money to buy the bike

a: week 8
b: week 9
c: week 6
d: week 7

3 answers

D and c are wrong

1,2,8 ...
isn't much of as pattern.

double, cube, 4th power, ...??
*1, *2, *2^2, ... ??
I can think of many ways to continue from 8 onward.