katlin95
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
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katlin95
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@ninjawolfjj
katlin95
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@e.cociuba
jim_thompson5910
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A = P(1 - r)^t
A = 1900(1 - 0.2)^4
A = ???
katlin95
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778.24
jim_thompson5910
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so it's B
katlin95
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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
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A = P(1+r/n)^(n*t)
plug in
P = 600
r = 0.10
n = 2
t = 4
katlin95
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one sec about to solve it
katlin95
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886
katlin95
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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
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886 is close, it should be 886.47, but you got the idea
jim_thompson5910
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for this last one, you got ???
katlin95
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yep I knew that I new it was a lol
katlin95
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for last one I got C
jim_thompson5910
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1+r = 1+0.08 = 1.08, so it should be A
jim_thompson5910
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you would do 1-r = 1-0.8 = 0.92 if it were decreasing, but it's INCREASING
katlin95
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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
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you tell me
katlin95
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d
jim_thompson5910
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nope, this is a decreasing exponential function
katlin95
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B
jim_thompson5910
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if it were positive, then it would be increasing
katlin95
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yep so that would make it B, because its a negative right
jim_thompson5910
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it can't be B because B is decreasing
jim_thompson5910
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if B was positive (it's not), then it would be increasing
katlin95
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oh okay, then it must be A
jim_thompson5910
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A isn't it for the same reason as D
jim_thompson5910
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so you can probably guess what it must be lol
katlin95
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c lol:)
katlin95
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@jim_thompson5910 can you help me with this assignment, im very confused.
jim_thompson5910
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sry don't have enough time to do the whole thing
katlin95
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could u possibly tomorrow:)?
jim_thompson5910
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i might have more time tomorrow