Persuasive Communication

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  • Topic: Problem solving, Exponentiation, Number
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  • Published : February 25, 2013
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Learning Team Weekly Summary
Catherine Poplawski
Esperanza Rebollar
Luis Linares
Sofia Garcia
MATH 208
November 26, 2012
Jason Beaudry

Below is a compilation of the four most difficult problems according to members of Team B, during week five of class: Problem #1 by Sofia Garcia
Evaluate the expression. Write the answer in standard form.
(-2 x 10⁻⁴)(2 x 10³)
-2x2=-4
10⁻⁴ x 10³=10⁻¹
= -4
Why do you think they were more difficult than others?
Because it’s a negative exponent then the decimal moves to the left. It was the most difficult problem in week 5 assignment. If a person is working too quickly they might move the decimal in the wrong direction. What did you do to overcome this difficulty?

I took my time in working with exponents, they were not difficult problems but a person can make an error by putting the decimal in the wrong place. How did you arrive at solution?
After carefully viewing the problem and figuring out my mistake I was able to finally get correct answer.

Problem#2 by Luis Linares
A moon is about 420,000 miles from the planet orbits.

a) Write this number in scientific notation.

b) If a rocket traveled at 6 x miles per hour, how long would it take for it to reach the moon from the planet?

a) Write the number 420,000 in scientific notation

420,000=4.2 x 105

b) It would take the rocket 7 hours to reach the moon

4.2x105 miles
6x104 miles
hours

4.2x105 =4.2 x 105
6x104 6 104

4.2=0.7
6

0.7x105=0.7x101
104

0.7x101=7

Thus it would take the rocket 7 hours to reach the moon.
Why do you think they were more difficult than others?
There were fractions involved and more steps when compared to the other problems What did you do to overcome this difficulty?
I took full advantage of the trusty View an example tool and I was able...
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