More help with GMath (1 Viewer)

[har]

http://www.boardofstudies.nsw.edu.au/hsc_exams/exam-papers-2007/pdf_doc/gen-maths-07.pdf

Q19 - How do I do it?

27B)IV) - Why would it be 2 Standard Deviations above the mean, not three??

Cheers

 

[face34]

 

[Kat92]

http://www.boardofstudies.nsw.edu.au/hsc_exams/exam-papers-2007/pdf_doc/gen-maths-07.pdf

Q19 - How do I do it?

27B)IV) - Why would it be 2 Standard Deviations above the mean, not three??

Cheers

27B)IV) It is a Z-score question.

 

[wavess]

I'm not sure how to start a thread, so i came here...
Can someone please help me with one question on spherical geometry:
It's b) iii:


I keep getting a different answer.

 

[Kat92]

I'm not sure how to start a thread, so i came here...
Can someone please help me with one question on spherical geometry:
It's b) iii:
View attachment 26771

I keep getting a different answer.

Ok.. I will explain what I did:


The longitude difference between Osaka (135degreesE) and Denver (105degreesW) is (135degrees +105degrees) =240degrees.

Since 1degree longitude difference
= 4 min of time difference

240degree longitude difference
=(4*240)min
=960min
=16hr

Since Denver is to the West of Osaka, the local time in Denver is 16hr behind of the local time in Osaka.

Sent Denver time:
=(10:00am-16h)Thurs
=6.00pm Wednesday

Received:
=6.00pm +14hrs
=8am Thursday.



PS How to post a new thread> Click post new thread button. Add details and once done click the submit new thread button. (Easy, nothing to it really!)