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Mat/206 week4

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Mat/206 week4
Mathematics Assignment

153. Explain the negative exponent rule and give an example.
The main rule for a negative exponent is to always first make it into a positive before you start simplifying. For example y^-4+7=x
The first thing you would do is write it as this
1/y^4+7=x
Once this is completed you can then simplify.

154. How do you know if an exponential expression is simplified?
You can tell if an exponential expression is simplified when it brought down to the lowest possible simplification. For example
6y^3+y^3=x
These are like terms and can be added making it 7y^3=x
Now if we were multiplying we would add the exponents for example 6y^3*y^3=x
This would be written as 6y^6=x

155. How do you know if a number is written in scientific notation? You know that a number is written in scientific notation when there is a decimal number with one digit to the left of the decimal. For example let us take the number 53,000,000. In scientific notation it would be written as 5.3*10^7

156. Explain how to convert from scientific to decimal notation and give an example. This is the opposite of number written in scientific notation. If you have 5.3*10^7 it would be converted to 53,000,000

157. Explain how to convert from decimal to scientific notation and give an example.
This is the same question number 155. You convert a number such as 53,000,000 by taking out the zeros and putting a dot between the 5 and 3. It ends up looking like 5.3*10^7

158. Describe one advantage of expressing a number in scientific notation over decimal notation.
Numbers can get really large and hard to manage. For example 53000000*69000000 would end up as a huge number to be written out. Now if you write it as 5.3*10^7*6.9*10^7 makes it much simpler of a problem which the answer would be 3.657*10^14

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