Anyone good at Math?

[Ruststang]

I not sure where to post it but I'm so F*cking pissed with my algebra right now I'm not to worried about it....
I'm terrible with word problems that involve dimensions and I'm stuck so I've decided to see if anyone here could help me out.
The problem reads as follows-
The width of a rectangular box is 3 times its height, and its length is 7 more than its height.
Find the Dimensions of the box if its volume is 108 cubic inches...

I will rep help
I'm just stuck right now and can't use my brain anymore.

[Verik]

h=2
w=6
l=9

(2)(6)(9)=108

[Double_0_Rusty]

google.com?

I used to be awesome at math, but that was years ago. Now, I'm just awesome with cars.

[umairejaz]

I used trial and error.

[Motivation]

h=2
w=6
l=9

(2)(6)(9)=108

BUT that would mean that the length wasn't 7 times the height...

EDIT: nvm... i just realized it said 7 more, not 7 times more... lol

[Verik]

BUT that would mean that the lenght wasn't 7 times the height...

length isn't 7h. its 7+h, reread the problem. heres my work

h(3h)(7+h)=108

3h^3+21h^2=108

h^3+7h^2-36=0

solve for zero and you have h=-6, h=-3, h=2.

first two are impossible dimensions so only answer left is h=2. Double check it works (2)(3[2])(7+2)=108 and you have the answer.

[Motivation]

length isn't 7h. its 7+h, reread the problem. heres my work

h(3h)(7+h)=108

3h^3+21h^2=108

h^3+7h^2-36=0

solve for zero and you have h=-6, h=-3, h=2.

first two are impossible dimensions so only answer left is h=2. Double check it works (2)(3[2])(7+2)=108 and you have the answer.

I already editted my post. lol

[Verik]

lol too fast :P

[Ruststang]

Thats awesome and i thank you very much and repped as well!

[Verik]

np, pm me if you have any other hw questions. tonight is a dull night

[umairejaz]

^Want to take a finance quiz??! lol

[Verik]

<-- finance major here.

[ironchef]

^Want to take a finance quiz??! lol

Post it up! I want to see what I remember from Corporate Finance.

[Mr. Clean]

fuck math!

only class in 15 years of school that i ever failed was pre-cal in college. i'm in round 2 right now and it's looking like another fail lol. i just can't wrap my head around proofs and using the trig function identities.

[umairejaz]

<-- finance major here.

What year? Are you serious? I got five attempts. Want to try?

[umairejaz]

It actually opens at midnight.

[Verik]

heh, only a 3rd year. lmk though, i'd def be interested in taking a shot.

[umairejaz]

sweeet, wanna wait an hr? I have absoluly no idea what we're doing in there actually.

[Verik]

sure i'll be up til 2 actually. whats the class? lol

[umairejaz]

Post it up! I want to see what I remember from Corporate Finance.

Your welcome to take it too , just gotta leave me an attempt so I can study and make that 100 if you guys fail :boobies:

[umairejaz]

Corp Finance 3511

[ironchef]

Just post up the questions in here, so we'll work them out, and then you can just answer them.

[umairejaz]

ok, I will at 12

[Verik]

post up

[umairejaz]

shit, just checked it and it says 8am. I had assumed wrong.

[umairejaz]

now im gonna have to do it alone, fauuuuuccck

[ironchef]

Post it up tomorrow, I probably won't have shit to do at work, haha.

[Verik]

same, ill be on probably.

[Magnus213]

<3 math.

[umairejaz]

sounds good.

[ironchef]

Wheres the quiz? I'm bored.

[umairejaz]

here u go! i got 45min window only

[umairejaz]

1. IRR indicates a project is deemed desirable (acceptable) when:

a. the IRR is greater than or equal to zero

b. the IRR is less than zero

c. the IRR is greater than or equal to the risk-adjusted cost of capital

d. the IRR is less than the risk-adjusted cost of capital




2. One factor that makes capital budgeting one of the most important function of financial managers is that:

a. the decisions generally have a short-term effect on the firms performance.

b. the decisions generally do not involve long-term assets.

c. the decisions generally do not involve substantial expenditures

d. all of the above are true

e. none of the above are true




3. Determine the net present value for a project that costs $299,000 and would yield after-tax cash flows of $27,000 per year for the first 9 years, $35,000 per year for the next 16 years, and $48,000 per year for the following 10 years. Your firm's cost of capital is 10.00%.

a. -$154.08

b. -$109.92

c. -$129.79

d. -$203.39

e. -$221.88




4. Determine the net present value for a project that costs $58,500 and would yield after-tax cash flows of $9,000 the first year, $11,000 the second year, $14,000 the third year, $16,000 the fourth year, $20,000 the fifth year, and $26,000 the sixth year. Your firm's cost of capital is 5.00%.

a. $37,500.00

b. $16,954.36

c. $96,000.00

d. $20,377.84

e. $27,471.55




5. Determine the internal rate of return for a project that costs $228,000 and would yield after-tax cash flows of $22,000 per year for the first 5 years, $30,000 per year for the next 5 years, and $43,000 per year for the following 5 years.

a. 7.81%

b. 9.26%

c. 8.73%

d. 7.51%

e. 9.75%




6. Determine the internal rate of return for a project that costs -$143,000 and would yield after-tax cash flows of $22,000 the first year, $24,000 the second year, $27,000 the third year, $29,000 the fourth year, $33,000 the fifth year, and $39,000 the sixth year.

a. 4.53%

b. 5.37%

c. 5.06%

d. 4.36%

e. 5.65%




7. Your company has an opportunity to invest in a project that is expected to result in after-tax cash flows of $9,000 the first year, $11,000 the second year, $14,000 the third year, -$8,000 the fourth year, $21,000 the fifth year, $27,000 the sixth year, $30,000 the seventh year, and -$6,000 the eighth year. The project would cost the firm $53,900. If the firm's cost of capital is 14%, what is the modified internal rate of return?

a. 13.26%

b. 11.87%

c. 14.06%

d. 11.41%

e. 14.80%

[umairejaz]

25 min remainng.

[ironchef]

Ok so far I've got....

3. a
4. d

[umairejaz]

lol 9 min remaining.

[umairejaz]

I got number 2, 3 min remiann!!

[umairejaz]

1 mnin

[ironchef]

5.b
6.b

This is what I got for 7 using excel, but I'm not sure if its right.
7.c

[umairejaz]

60%