Calculating SCIENTIFIC NOTATION by hand help .

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Homework Help Overview

The discussion revolves around calculating a mathematical expression involving scientific notation. The original poster seeks assistance with the calculation of \(((4*10^5)(5*10^{-7})) / (2*10^{-3})\) and expresses confusion regarding the expected result.

Discussion Character

  • Mathematical reasoning

Approaches and Questions Raised

  • Participants explore the multiplication and division of the coefficients and the addition and subtraction of the exponents in scientific notation. There is an attempt to clarify the steps involved in reaching the final answer.

Discussion Status

Some participants provide calculations that lead to the conclusion of 100, while others confirm the steps taken. There is an exchange of reasoning, but no explicit consensus is reached on the original poster's understanding.

Contextual Notes

The original poster requests a step-by-step explanation, indicating a need for clarity in the process of calculating scientific notation by hand.

camboguy
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calculating SCIENTIFIC NOTATION by hand help please.

((4*10^5)(5*10^-7)) / (2*10^-3)


im getting 10 and the answer but its should be 100 can you please tell me what i am so posted to do step by step please.
 
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4*5/2=10. Doing the exponents 5+(-7)-(-3)=1. So 10*10^1=10*10=100.
 
If that is indeed the problem as stated, then

Mantissa:

(4 * 5) / 2 = 20 / 2 = 10

Exponents:

5 - 7 -(-3) = 8 - 7 = 1

Answer = 10 * 10^1 = 10 * 10 = 100 = 1 * 10^2

Do you see?
 
thanks you very much
 

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