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course Mth 151

k?????}a??y????assignment #020

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020. `query 20

College Algebra

12-14-2007

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01:53:35

query 4.3.6 number following base-six 555

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RESPONSE -->

555= (5*6^2)+(5*6^1)+(5*6^0)

worked out and added together = 6000

confidence assessment: 3

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01:55:37

query 4.3.20 34432 base five

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RESPONSE -->

2+5(3+5(4+5(4+3*5)= 2492

confidence assessment: 3

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01:56:46

Explain how you use the calculator shortcut to get the given number.

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RESPONSE -->

the same way i worked the problem

confidence assessment: 3

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02:05:01

query 4.3.40 11028 decimal to base 4

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RESPONSE -->

4^1=4 4^2=16 4^3=64 4^4=256

4^5=1024 4^6=4096 4^7= 16,386

2*4^6=8192 leaving 2836

2*4^5=2048 leaving 788

3*4^4=8192 leaving 20

0*4^3=

1*4^2=16 leaving 4

1*4^1= 4 leaving 0.0*461

2230110 base 4

confidence assessment: 2

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02:06:50

query 4.3.51 DC in base 16 to binary

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RESPONSE -->

c=dec. 12/bin. is 100

d= dec. 13/bin is 1101

The base 16 is the fourth power of 2

1101 1100

confidence assessment: 3

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02:07:11

Is a base-9 number always even, always odd, or sometimes even and sometimes odd if the number ends in an even number?

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RESPONSE -->

depends on the problem

confidence assessment: 1

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assignment #021

021. `query 21

College Algebra

12-14-2007

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10:24:52

4.4.6 star operation [ [1, 3, 5, 7], [3, 1, 7, 5], [5, 7, 1, 3], [7, 5, 3, 1]]

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RESPONSE -->

* 1,3,5,7 closed/all from the same set

1 1,3,5,7

3 3,1,7,5

5 5,7,1,3

7 7,5,3,1

confidence assessment: 2

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10:32:43

** For example if a = 2, b = 5 and c = 7 we have

a + (b + c) = 2 + (5 + 7) = 2 + 12 = 14 but

(a+b) * (a+c) = (2+5) + (2+7) = 7 + 12 = 19. **

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RESPONSE -->

a+(b*c)=1+(3*5)=1+15=16

(a+b)*(a+c)=(1+3)*(1+5)

=4*5

=20

self critique assessment: 2

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10:35:57

4.4.33 venn diagrams to show that union distributes over intersection

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RESPONSE -->

?

confidence assessment: 0

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"

Good overall, but you had some errors here and should have included given solutions and self-critiques.