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**1. Homework Statement**

(* to the power of) 20m3 equals to

a)2x10-8km3

b)2x10*6cm3

c)2x10*5dm3

d)2x19*9mm3

**2. Homework Equations**

ok

1000m=1km

so 1km3 is equal to 1000x1000x1000=10*9

so 10*9/20m3=50,000,000

1km3/50x10*6=20

from here i'm confused

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**3. The Attempt at a Solution**

iv attempted to use this method for all the above case yet i continue to get confused help would b warmly appreciated