Can someone please verify this answer?

[ipswitch]

This is a step in answering a vertical curve question and I get L=6. The book says L=82. Can anyone verify this? I keep getting L=6 and I'm pretty sure that's the answer and the book is wrong. Sorry for the bad tracing!

 

[sac_engineer]

This is a step in answering a vertical curve question and I get L=6. The book says L=82. Can anyone verify this? I keep getting L=6 and I'm pretty sure that's the answer and the book is wrong. Sorry for the bad tracing!

rearrange:

59/44 = (L/2 + 3)^2 / (L/2 - 3)^2

square root both sides and multiply the right side by 2/2

1.16 = (L + 6)/(L - 6)

multiply both side by (L-6)

1.16L - 6.95 = L + 6

0.16L = 12.95

L = 80

 

[sac_engineer]

This is a step in answering a vertical curve question and I get L=6. The book says L=82. Can anyone verify this? I keep getting L=6 and I'm pretty sure that's the answer and the book is wrong. Sorry for the bad tracing!

rearrange:

59/44 = (L/2 + 3)^2 / (L/2 - 3)^2

square root both sides and multiply the right side by 2/2

1.16 = (L + 6)/(L - 6)

multiply both side by (L-6)

1.16L - 6.95 = L + 6

0.16L = 12.95

L = 81

 

[ipswitch]

thanks!

 

[IlPadrino]

This is a step in answering a vertical curve question and I get L=6. The book says L=82. Can anyone verify this? I keep getting L=6 and I'm pretty sure that's the answer and the book is wrong. Sorry for the bad tracing!

Not to be demoralizing... but mistakes like this make it *VERY* much harder to pass the exam. How did you come up with 6? Do you recognize that plugging in 82 makes the two sides of the equation equal?

But not to leave you hopeless: remember this is a multiple choice exam. If you get a final equation you can't solve easily, then... DON'T SOLVE! Plug in each of the answers to you find the one that works.

 

[ipswitch]

This is a step in answering a vertical curve question and I get L=6. The book says L=82. Can anyone verify this? I keep getting L=6 and I'm pretty sure that's the answer and the book is wrong. Sorry for the bad tracing!

Not to be demoralizing... but mistakes like this make it *VERY* much harder to pass the exam. How did you come up with 6? Do you recognize that plugging in 82 makes the two sides of the equation equal?

But not to leave you hopeless: remember this is a multiple choice exam. If you get a final equation you can't solve easily, then... DON'T SOLVE! Plug in each of the answers to you find the one that works.

Actually, you DO get L=6 when you subtract where you're supposed to be adding. Whiskey. Tango. Foxtrot.

Don't worry buddy. It takes more than just YOU to demoralize ME and I hope you feel the same.

 

[Desert Engineer]

This is a step in answering a vertical curve question and I get L=6. The book says L=82. Can anyone verify this? I keep getting L=6 and I'm pretty sure that's the answer and the book is wrong. Sorry for the bad tracing!

Not to be demoralizing... but mistakes like this make it *VERY* much harder to pass the exam. How did you come up with 6? Do you recognize that plugging in 82 makes the two sides of the equation equal?

But not to leave you hopeless: remember this is a multiple choice exam. If you get a final equation you can't solve easily, then... DON'T SOLVE! Plug in each of the answers to you find the one that works.

Actually, you DO get L=6 when you subtract where you're supposed to be adding. Whiskey. Tango. Foxtrot.

Don't worry buddy. It takes more than just YOU to demoralize ME and I hope you feel the same.

L=6 cannot work: if L=6, then 44/(L/2-3)^2--> 44/(6/2-3)^2--> 44/0= infinity

 

[IlPadrino]

Actually, you DO get L=6 when you subtract where you're supposed to be adding. Whiskey. Tango. Foxtrot.
Don't worry buddy. It takes more than just YOU to demoralize ME and I hope you feel the same.

OK... keep telling yourself that and good luck! But if you can't avoid simple math mistakes (that middle school should have prepared you for) you'll have a hard time passing the exam. Has radically changing the paradigm of your self-pedagogy or changing your diet been enough to overcome this deficiency?

 

[ipswitch]

Actually, you DO get L=6 when you subtract where you're supposed to be adding. Whiskey. Tango. Foxtrot.
Don't worry buddy. It takes more than just YOU to demoralize ME and I hope you feel the same.

OK... keep telling yourself that and good luck! But if you can't avoid simple math mistakes (that middle school should have prepared you for) you'll have a hard time passing the exam. Has radically changing the paradigm of your self-pedagogy or changing your diet been enough to overcome this deficiency?

Lol. Jesus, you're a hardcore asshole. Is there some issue you have that compels you to add stupidity to my thread other than providing me with the answer to my question? If you have some sort of mental issue that gives you the inclination to be a keyboard warrior, there's shrinks at the VA you could visit.