Question

I am trying to calculate a spread but struggling to calculate the answer to the power of 1/3 as I can't find the button on my calculator. Can anyone help?
The formula is 3[3/4x50x4,000,000/.00025]to pwer 1/3

Answer 1

When I multiply/divide I get 1.8 10E12 so I guess we are looking the the cube root of 1.8 as the power 0f 10 would be 10^4

Answer 2

My calculator agt Casio fx-300W has a cube root button but I believe you could use the x^y button, anyway my cube root button gives the cube root of 1.8 as 1.2644

Answer 3

Yes, the x^y button can be used. enter 1.8, enter x^y, enter .33333 and see what you get.

Answer 4

1.2644 10^4

Answer 5

What did you come up with. I may have gotten the value in the paren wrong??

Answer 6

The answer is £25,303

Answer 7

Let me refigure: I am taking 3[.75x50x4,000,000/.00025]to the 1/3

Did you get that before we take the cube root?

Answer 8

yes thats the right figures

Answer 9

\[3((6.0)10^{11})^{1/3}\]

Answer 10

Is that what you get before taking the cube root?

Answer 11

If i feed into my calculator i get 3[6^11]^1/3

Answer 12

I'm not a genius with equations so am struggling with this one

Answer 13

I am adjusting the expression to read:\[3(0.60 x 10^{12})^{1/3}\]

Answer 14

So now I only need the cube root of 0.60 as the cube root of 10^12 is 10^4
\[3(.8434)10^{4}=2.5302(10^{4})\]

Answer 15

That agrees with your answer. Have you tried extracting the cube root using the x^y key of your calculator?

Answer 16

How do you do that? I assume I need to break the equation down and calculate the different parts but how did you get to 3(0.60x10^12)1/3? Or am I being a bit thick?

Answer 17

Do you understand scientific notation using exponents for 10?

Answer 18

No

Answer 19

\[(3(6.0 x(10^{11})^{1/3}\] is the value obtained on the values you have included inside the bracket. Now the 10^11 is the multiplier for the 6.0 or actually it is
600,000,000,000 which is 6 times 10^11 or 6 and 11 zeroes. A very unwieldy number.

Answer 20

\[10^{11} = 10^{2}(10^{9})\]

Answer 21

3[6.0 10^11]^1/3 is the same 3[6.0 x 10^-1 x10^2]
3[.6 x 10^-12]^1/3
and so on.

On using the calculator on the data inside the brackets, since there were no additional parens, proceed from left to right inside the bracket. Note that the cube root only applied to the data inside the bracket. I made the mistake on my first attempt by multiplying by three before taking the cube root.

Answer 22

Review "scientific notation" it will surely help you when you deal with large and very small values. sometimes the calculator will automatically express (display) large numbers using that form of notation.

Answer 23

Good luck.

Answer 24

Thanks for your help, much appreciated.