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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OpenStudy (anonymous):
@ninjawolfjj
OpenStudy (anonymous):
@e.cociuba
jimthompson5910 (jim_thompson5910):
A = P(1 - r)^t
A = 1900(1 - 0.2)^4
A = ???
OpenStudy (anonymous):
778.24
jimthompson5910 (jim_thompson5910):
so it's B
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OpenStudy (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
jimthompson5910 (jim_thompson5910):
A = P(1+r/n)^(n*t)
plug in
P = 600
r = 0.10
n = 2
t = 4
OpenStudy (anonymous):
one sec about to solve it
jimthompson5910 (jim_thompson5910):
k
OpenStudy (anonymous):
886
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OpenStudy (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
jimthompson5910 (jim_thompson5910):
886 is close, it should be 886.47, but you got the idea
jimthompson5910 (jim_thompson5910):
for this last one, you got ???
OpenStudy (anonymous):
yep I knew that I new it was a lol
OpenStudy (anonymous):
for last one I got C
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jimthompson5910 (jim_thompson5910):
1+r = 1+0.08 = 1.08, so it should be A
jimthompson5910 (jim_thompson5910):
you would do 1-r = 1-0.8 = 0.92 if it were decreasing, but it's INCREASING
OpenStudy (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
jimthompson5910 (jim_thompson5910):
you tell me
OpenStudy (anonymous):
d
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jimthompson5910 (jim_thompson5910):
nope, this is a decreasing exponential function
OpenStudy (anonymous):
B
jimthompson5910 (jim_thompson5910):
if it were positive, then it would be increasing
OpenStudy (anonymous):
yep so that would make it B, because its a negative right
jimthompson5910 (jim_thompson5910):
it can't be B because B is decreasing
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jimthompson5910 (jim_thompson5910):
if B was positive (it's not), then it would be increasing
OpenStudy (anonymous):
oh okay, then it must be A
jimthompson5910 (jim_thompson5910):
A isn't it for the same reason as D
jimthompson5910 (jim_thompson5910):
so you can probably guess what it must be lol
OpenStudy (anonymous):
c lol:)
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jimthompson5910 (jim_thompson5910):
yep
OpenStudy (anonymous):
@jim_thompson5910 can you help me with this assignment, im very confused.