Question

.) Perform the indicated operation without the use of a calculator and express each answer in decimal notation.

A. 6e+13
B. 6000
C. 0.00006
D. 60,000

The Problem is in the Comments below

Answer 1

Problem Here :D

Answer 2

ok, so this is just a manipulation of notations. Think of the equation as such:
\[\frac{4.2*(10)*(10)*(10)*(10)*(10)*(10)*(10)*(10)*(10) }{7*(10)*(10)*(10)*(10)*(10)} \]
There are a few 10s that cancel one another as you can see, so this fraction reduces to \[\frac{ 4.2*(10)*(10)*(10)*(10) }{ 7 }\]
we can rearrange this fraction by multiplying 4.2 by one of the 10s on the numerator\[\frac{ 42*(10)*(10)*(10) }{ 7 }\]
This fraction may now be written into an equivalent form\[\frac{ 42 }{7 }*(10)*(10)*(10)\]
evaluating this we have\[6*10^3\]
which is 6000

Answer 3

The key is to think of scientific notation in a different manner.