Question

If you bought a car at $1900 which depreciates 20% each year, what will it be worth after 4 years?
A.$578
B.$778
C.$988
D.$1,588

Answer 1

i use y=ab^t+k formula?

Answer 2

Pretty much

Answer 3

Geometric Sequence!
a1 = 1900
r = 0.80
n = 4

Answer 4

compond intrest cormula? i use?

Answer 5

\[a_n = a_1 \times r ^{n-1}\]

Answer 6

ok

Answer 7

\[a_4 = 1900(0.80)^{3}\]

Answer 8

a 4 =972.8

Answer 9

yep

Answer 10

wait mb

Answer 11

what do i do next?

Answer 12

its B.
you are looking for the 4 year so..
its n = 5 i guess.
a5 = 778