Assignment 11 A-B

course MTH 151

???a??????????assignment #010

010. `Query 10

College Algebra

02-22-2009

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16:10:42

There is no Query 9. This is a result of the textbook's renumbering of sections for a new edition.

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RESPONSE -->

ok

confidence assessment: 1

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16:10:52

This program will exit when you hit Enter Answer.

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RESPONSE -->

ok

confidence assessment: 1

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??????N?????????assignment #011

011. `Query 11

College Algebra

02-22-2009

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16:12:01

Query 1.4.24 1 to any power is what?

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RESPONSE -->

1 to any power is 1 because it would be 1*1 which would =1

confidence assessment: 1

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16:12:11

** The meaning is 1^2, 1^3, 1^4. We take a power of the base.

The result is always 1. **

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RESPONSE -->

correct

self critique assessment: 3

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16:13:36

Query 1.4.30 sqr of neg gives what?

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RESPONSE -->

It would be a positive because a negative * negative will equal a positive.

confidence assessment: 2

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16:15:39

** The square root of a negative will often give you an error (what can you square to get a negative, since any number squared is positive?), but on certain calculators it gives a complex number (actually two complex numbers). These are not real numbers; for the purposes of this course there is no real square root of a negative number.

There is no real number that can be squared to give a negative. If you square a negative number you get a negative times a negative, which is positive. If you square a positive number you get a positive number. So a negative number has no real square root. **

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RESPONSE -->

It is correct that negative * negative = positive but I also see that a negative does not have a real square root.

self critique assessment: 2

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16:20:16

Query 1.4.42 drawer has 18 compartments; how many drawers to hold 204 tapes?

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RESPONSE -->

204/18=11 with 6 leftover. So we need 12 drawers all together.

confidence assessment: 1

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16:20:30

** 204 / 18 = 11 with remainder 6. If we had 11 drawers they would hold all but 6 of the tapes.

The leftover tapes also have to go into a drawer, so we need a 12th drawer. **

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RESPONSE -->

correct

self critique assessment: 3

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