Wednesday 15 February 2017

STANDARD FORM 1D


Evaluate the following giving your answer in standard form.
2582.7 x 10-9
   5 x 10-20

Solution

2582.7 x 10-9
       5 x 10-20

2582.7  x   10-9
       5             10-20

=  516.54 x 10-9 –(-20)  [after dividing 2582.7 by 5]

=  516.54 x 10-9 + 20   

=  516.54 x 1011      then we change 516.54 into standard form as well

= 5.1654 x 102 x 1011   [when we have exponents with same base, we add 
   the powers.]
 
= 5.1654 x 1013

= 5.17 x 1013 [correct to 2 d.p.]

Hence   2582.7 x 10-9   = 5.17 x 1013
                5 x 10-20

TRY THIS………………..

Evaluate the following giving your answer in standard form.
0.006647 x 10-9

 4 x 10-30

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