Martin has $200 in a savings account. he is looking at 2 investment plans. under a, he will increase gis account balance by $40 each year. under b he will increase his account balance by 15% each year. approximately how much more will he earn with plan b after 10 years.

-6 + 3 = 3 - 6

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2