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This topic contains 11 replies, has 8 voices, and was last updated by John Moffat 9 months, 3 weeks ago.

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September 4, 2010 at 6:41 am
Does anyone know how you get the 3rd square of a number on a calculator??? Refer to example 3 of the Miller Orr Model in the lecture video.
Thanks
September 4, 2010 at 8:24 am
Do you have a scientific calculator?
You need one for this and most will have a special button – like a square root symbol, but with a 3 on it.September 5, 2010 at 11:21 pm
Yes I have a scientific calculator but it does not have a square root symbol with a 3 on it??
September 6, 2010 at 4:53 am
In that case, does it have a square root symbol with an x on it?
September 14, 2010 at 5:02 pm
Or a key with a X to the power of y on it? It actually written x^y in the calculator included with MS windows. If this is the case you enter the number hit the x^y key then enter 3 and hit =
September 14, 2010 at 5:29 pm
well,
you need scientific calculator, full stop.
you can’t take PC or mobile phone into exam hall,September 14, 2010 at 5:46 pm
I’m not suggesting they use a PC just explaining a very common way roots above the squared roots are computed on a scientific calculator. Neither the HP, Casio or TI scientific calculators have a key as you describe in all of these you must use the” to the power off key” and then a negative 3 to get a cubed root.
I’m assuming that since they’re posting on here they are most likely on a MS Windows PC and would therefore be able to check this out immediately using the inbuilt calculator – so they would know what to look for on an actual scientific calculator.
September 15, 2010 at 2:00 pm
Perhaps you could instead try using the X^Y key and put in 0.3333333333… This should give the equivalent answer to finding the cube root.
October 1, 2010 at 12:26 pm
@ joannemcdonnell what you can do is put it on the calculator like this:
(3/4 x transaction cost x variance of cash flows)^(1/3)
…and then the figure you get, you multiply it by 3for instance in example 3:
(3/4 x 5 x 2000² ÷ 0.00014)^(1/3) = 4750
…then you take 4750 and multiply it by 3, you will obtain 14250December 3, 2016 at 11:57 am
John I’m also having problem with entering the formula into my calculator, I have a Casio fx83GT PLUS
I have my exam coming up on Wednesday and it would be really helpful to know which buttons to hit and which order!
I’m doing a different question, where the details are as follows:
Transaction cost is $30
Variance of cash flow is $270,000
Daily interest rate is 0.025%I think it’s just the 1/3 that’s throwing things out, not sure which button to press!
The spread should come out to $8,689
I hope you can help John
Regards
Neville
December 3, 2016 at 4:14 pm
Sorry, but you must ask in the Ask the Tutor Forum if you want for me to answer. This forum is for students to help each other.

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