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Q). Write 2(to the power of 25) x 5 (to the power of 27) in standard form.

Is there a way to do this more easily without a calculator? 

It's a 3 mark question so should be done in 3 minutes or so I assume?

 

I understand the answer is 2.5x10(to the power of 26) but edexcels revision booklet doesn't give any information on how to even approach this.

 

Thanks!

Guest Oct 29, 2017
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4+0 Answers

 #1
avatar+78590 
+1

2^25  *  5^27

 

Note that we can write this in the following manner

 

[2 * 5 ]^25    *  5^2   =

 

[10]^25  *   25  =

 

25  x 10^25  =

 

2.5 x 10^26       [ in scientific notation  ]

 

 

cool cool cool

CPhill  Oct 29, 2017
edited by CPhill  Oct 29, 2017
 #2
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And... how much would I have to pay you to do my maths exam? :') thanks CPhill

Guest Oct 29, 2017
 #3
avatar+78590 
0

I work cheap.....LOL!!!!

 

Unfortunately....I can't guarantee that you will pass........!!!!

 

 

cool cool cool

CPhill  Oct 29, 2017
 #4
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I'll trade you two pencils and a pot noodle and you'll get an A* - I believe in you!

Guest Oct 29, 2017

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