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Standard Form and Properies

Mohammed copies this problem into his notebook
(3.4x10^5)(3.8x10^-9)
A. Use the associative and commutatitive properties to rearrange the factors.
B. Find the product. Write the product in standard form.
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1 Answer

Rearrange:
 
(3.4)(3.8)(105)(10-9)
 
(3.4)(3.8) = 12.92
 
(105)(10-9) = 10-4
 
So now you have 12.92 x 10-4
 
Move the decimal one to the left to get 1.292, but now you must change the -4 to a -3 because you already moved it one place to the left.
 
1.292 x 10-3   = .001292