Answer:
65970.69
Step-by-step explanation:
This is a geometric sequence but with interest so we will 1st find the common ratio (r)
a1= 15000
a2= 15000+15000(0.28) or 19200
a3=19200+19200(0.28) or 24576
to find r well use: a2/a1 and a3/a2 so:
19200/15000=1.28
24576/19200=1.28
So we know that r=1.28
ill use the formula:
an=a1^r(n-1)
where n is the number or kung pang ilan so 7th (AFTER 6 YEARS)
a1 is the 1st term so 15,000
r is the constant ratio so 1.28
a7=15000(1.28^7-1)
a7=15000(1.28^6)
a7=65970.69
65970.69 is what Ana will earn in 6 yrs
