Question

Please help me ; - ;

Answer 1

ANYONE PLEASE

Answer 2

@inkyvoyd

Answer 3

think you use \[a_1\left(\frac{1-r^n}{1-r}\right)\]

Answer 4

whoa, never seen that before...

Answer 5

i am not getting any of your answer choices though

Answer 6

they are not showing up?

Answer 7

they show up, but none is what i get when i add

Answer 8

idk, this is a khan academy question

Answer 9

k i made a mistake, got it now

Answer 10

o, k let me try this real quick, gotta find paper

Answer 11

you need paper to figure out what to compute, you need a calculator to compute it

Answer 12

good point, an btw, is n 20?

Answer 13

\[a_1\left(\frac{1-r^n}{1-r}\right)\]\[a_1=8,r=-1.5\]

Answer 14

and yes, \(n=20\)

Answer 15

ah

Answer 16

lets seee

Answer 17

is it... A?

Answer 18

nope

Answer 19

o

Answer 20

let me try again

Answer 21

probably screwed up when you put it in the calculator, that is why they used that as a "distractor"

Answer 22

So it ends up looking like \[8(\frac{ 1+1.5^20 }{1+1.5 })\]

Answer 23

no

Answer 24

o

Answer 25

well, thats where i went wrong

Answer 26

\[8\left(\frac{1-(-1.5)^{20}}{1+1.5}\right)\]

Answer 27

a crud i forgot the ^20 is on the QUOTIENT of -1.5

Answer 28

r.i.p

Answer 29

GOT IT

Answer 30

Its D