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

- anonymous

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- anonymous

@ninjawolfjj

- anonymous

@e.cociuba

- jim_thompson5910

A = P(1 - r)^t
A = 1900(1 - 0.2)^4
A = ???

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## More answers

- anonymous

778.24

- jim_thompson5910

so it's B

- anonymous

How much will $600 amount to be if it is invested at 10% interest compounded semiannually (two times a year) for 4 years?
A. $886.47
B. $952.40
C. $1063.20
D. $1168.17

- jim_thompson5910

A = P(1+r/n)^(n*t)
plug in
P = 600
r = 0.10
n = 2
t = 4

- anonymous

one sec about to solve it

- jim_thompson5910

k

- anonymous

886

- anonymous

If the current value of a property is $20,000 and its value is increasing at 8% per year. Find the expression for the value after t years.
A. $20,000(1.08)t
B. $20,000(1.8)t
C. $20,000(0.92)t
D. $20,000(1.18)t

- jim_thompson5910

886 is close, it should be 886.47, but you got the idea

- jim_thompson5910

for this last one, you got ???

- anonymous

yep I knew that I new it was a lol

- anonymous

for last one I got C

- jim_thompson5910

1+r = 1+0.08 = 1.08, so it should be A

- jim_thompson5910

you would do 1-r = 1-0.8 = 0.92 if it were decreasing, but it's INCREASING

- anonymous

okay last one:
Which of the following functions increases, going upwards from left to right on a graph?
A. y = 2(1/3)x
B. y = -2(3)x
C. y = 2x + 6
D. y = 3(1/2)x

- jim_thompson5910

you tell me

- anonymous

d

- jim_thompson5910

nope, this is a decreasing exponential function

- anonymous

B

- jim_thompson5910

if it were positive, then it would be increasing

- anonymous

yep so that would make it B, because its a negative right

- jim_thompson5910

it can't be B because B is decreasing

- jim_thompson5910

if B was positive (it's not), then it would be increasing

- anonymous

oh okay, then it must be A

- jim_thompson5910

A isn't it for the same reason as D

- jim_thompson5910

so you can probably guess what it must be lol

- anonymous

c lol:)

- jim_thompson5910

yep

- anonymous

@jim_thompson5910 can you help me with this assignment, im very confused.

##### 1 Attachment

- jim_thompson5910

sry don't have enough time to do the whole thing

- anonymous

could u possibly tomorrow:)?

- jim_thompson5910

i might have more time tomorrow

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