## katlin95 2 years ago 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

1. katlin95

@ninjawolfjj

2. katlin95

@e.cociuba

3. jim_thompson5910

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

4. katlin95

778.24

5. jim_thompson5910

so it's B

6. katlin95

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

7. jim_thompson5910

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

8. katlin95

one sec about to solve it

9. jim_thompson5910

k

10. katlin95

886

11. katlin95

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

12. jim_thompson5910

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

13. jim_thompson5910

for this last one, you got ???

14. katlin95

yep I knew that I new it was a lol

15. katlin95

for last one I got C

16. jim_thompson5910

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

17. jim_thompson5910

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

18. katlin95

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

19. jim_thompson5910

you tell me

20. katlin95

d

21. jim_thompson5910

nope, this is a decreasing exponential function

22. katlin95

B

23. jim_thompson5910

if it were positive, then it would be increasing

24. katlin95

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

25. jim_thompson5910

it can't be B because B is decreasing

26. jim_thompson5910

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

27. katlin95

oh okay, then it must be A

28. jim_thompson5910

A isn't it for the same reason as D

29. jim_thompson5910

so you can probably guess what it must be lol

30. katlin95

c lol:)

31. jim_thompson5910

yep

32. katlin95

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

33. jim_thompson5910

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

34. katlin95

could u possibly tomorrow:)?

35. jim_thompson5910

i might have more time tomorrow