(03.07)
monica measures the number of bacteria that are living on her petri dish. each day, she measures the amount of change in the number of bacteria. these amounts create a geometric sequence. use the data in the table to determine the sum of the amounts of change in the bacteria after the seventh day.

x (day) y (amount of change in bacteria)

1 2

2 -8

3 32

4 -128

a] -6553.2

b] -10.8

c] 6554

d] 11.6