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Tuesday, March 8, 2011
hw #7-5 Incontrovertible Truths
pg 439 #1-infinity
pg 443 #19-23 Odd, 41-47 Odd
Problem Set 7B
Just a thought... you might find some of the video tutors on MathChamber helpful...
On #8 in problem set 7B I got 16.5x^5y^2 over y. I have a feeling this is wrong considering it took me about twenty minutes to get the answer. Just wondering if anyone else got this answer and the steps used to get to it.
What does it mean simplify the following expressions using positive exponents. For example (4.1*10^-3)(3.2*10^9). Would the answer be 13.12*10^6 or is that not in simplest form using positive exponents? Please Help!!!
For PS 7B 9&10, I should have said to write the answer in scientific notation.
When simplifying algebraic expressions with powers, you should not have negative exponents in your answer.
When simplifying scientific notation problems, it is appropriate to have negative exponents in the final answer. It just so happens that the problems in PS 7B have answers with positive exponents, but obviously that will not always be the case. I'll have to change that, thanks!
Your answer s/b in scientific notation. Your 12.13 is in violation, yes?
I was watching the video tutors on MC.. And so when you're converting scientific notation to standard you don't actually multiply, like for example if the equation was 6 * 10^-5, you just move the decimal point '5' units to the left? You don't simplify 10^-5? Help!
I'm glad you are watching MTV (Math TV that is!!... I crack myself up!)
If you are converting SciNot to Std notation, you need to eliminate the power of 10. In the example you provided, the "trick" is to move the decimal point 5 places to the left (of course, you'll have to "front-load" the 6 with some leading zeroes).
What you're actually doing is multiply 6 by 1/10 5 times, which would give you an answer in standard notation of 0.00006.
Not sure if I'm answering your question... I don't know what you mean by simplify 10^-5??
On #8 in problem set 7B I got 16.5x^5y^2 over y. I have a feeling this is wrong considering it took me about twenty minutes to get the answer. Just wondering if anyone else got this answer and the steps used to get to it.
ReplyDeleteThanks!
What does it mean simplify the following expressions using positive exponents. For example (4.1*10^-3)(3.2*10^9). Would the answer be 13.12*10^6 or is that not in simplest form using positive exponents? Please Help!!!
ReplyDeleteYup, for #8, you are right... you are wrong.
ReplyDeleteTha answer is 2x^3/y
Your first step should have been to turn the division problem into multiplication (multiply the reciprocal, right).
After that, you are just dividing out the coefficients and powers, right? Big fat ones are all over da place!
I'll post an answer key for PS 7B on mathchamber soon.
For PS 7B 9&10, I should have said to write the answer in scientific notation.
ReplyDeleteWhen simplifying algebraic expressions with powers, you should not have negative exponents in your answer.
When simplifying scientific notation problems, it is appropriate to have negative exponents in the final answer. It just so happens that the problems in PS 7B have answers with positive exponents, but obviously that will not always be the case. I'll have to change that, thanks!
Your answer s/b in scientific notation. Your 12.13 is in violation, yes?
I was watching the video tutors on MC.. And so when you're converting scientific notation to standard you don't actually multiply, like for example if the equation was 6 * 10^-5, you just move the decimal point '5' units to the left? You don't simplify 10^-5? Help!
ReplyDeleteI'm glad you are watching MTV (Math TV that is!!... I crack myself up!)
ReplyDeleteIf you are converting SciNot to Std notation, you need to eliminate the power of 10. In the example you provided, the "trick" is to move the decimal point 5 places to the left (of course, you'll have to "front-load" the 6 with some leading zeroes).
What you're actually doing is multiply 6 by 1/10 5 times, which would give you an answer in standard notation of 0.00006.
Not sure if I'm answering your question... I don't know what you mean by simplify 10^-5??
Mr. C.
I don't know what I meant either.. I'm just busy studying.. But I got what you're saying. Thank you!
ReplyDelete