Intermediate Algebra Tutorial 23


Intermediate Algebra
Answer/Discussion to Practice Problems
Tutorial 23: Exponents and Scientific Notation, Part I


WTAMU > Virtual Math Lab > Intermediate Algebra > Tutorial 23: Exponents and Scientific Notation, Part I


 

checkAnswer/Discussion to 1a

 
ad1a

*x to the zero power is 1
*Rewrite with a pos. exp. by taking recip. of base 
 
 
 
 

 
 

(return to problem 1a)


 

checkAnswer/Discussion to 1b

 
ad1b

*When mult. like bases you add your exponents

 
(return to problem 1b)


 

checkAnswer/Discussion to 1c

 
ad1c
*When div. like bases you subtract your exponents
 
 

*Rewrite with a pos. exp. by taking recip. of base 
 

 
 

(return to problem 1c)


 

checkAnswer/Discussion to 1d

 
ad1d
*When mult. like bases you add your exponents
 
 
 

*When div. like bases you subtract your exponents

 
 

(return to problem 1d)


 

checkAnswer/Discussion to 2a

 .00000146
 

Step 1:  Move the decimal point so that you have a number that is between 1 and 10.

 
ad2a1
*Decimal is at the beginning of the number

*Move decimal to create a number between 1 and 10
 

Step 2:   Count the number of decimal places moved in Step 1 .

 
How many decimal places did we end up moving?
We started at the beginning of the number .00000146 and moved it between the 1 and 4.  That looks like a move of 6 places.

What direction did I it move?
Looks like we moved it to the right.

So, our count is -6.
 

Step 3:   Write as a product of the number (found in Step 1) and 10 raised to the power of the count (found in Step 2).

 
ad2a2

 
(return to problem 2a)

 


 

checkAnswer/Discussion to 3a

 
problem 3a=
71,000,000,000

*Move the decimal 10 to the right

 
(return to problem 3a)

 

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WTAMU > Virtual Math Lab >Intermediate Algebra >Tutorial 23: Exponents and Scientific Notation, Part I


Last revised on July 11, 2011 by Kim Seward.
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