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School math question. Your input?

Posted on 03/10/2015 5:48:37 PM PDT by MNDude

My daughter has this problem-solving question for her homework. I'm feeling kind of dumb on this one. What do you think is the correct answer?

Mrs. Feltner wants to put a border on a baby blanket. The area of the blanket is 12 square units. Which shows how many units of materials she needs for the border?

A 12 units B 14 units C 15 units D 21 units

TOPICS: Chit/Chat
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To: SpaceBar

Yes. B, C, and D could all be correct. Any answer over two times the square root of 12 could be correct. For example, 96.5 would be correct if the blanket were 48 units long and 0.25 units wide. The only answer among those given where the sides are whole numbers is 14.

101 posted on 03/10/2015 6:53:47 PM PDT by The Truth Will Make You Free

To: lkco

Nice catch! I’m thinking however that the assignment taken context is helping her learn to find and use whole number factors.

I disagree with those who are ripping the teacher or school system here. But I can see her answering 14 and then provide the logic for 15. Then demand an extra credit point.

102 posted on 03/10/2015 6:54:03 PM PDT by mmichaels1970

To: lkco

Would if L X W = 12 sq. units, but alas, it doesn’t in regular math; however, I haven’t the time or patience to try it in “new math” or “common core math” which might or might not meet their exacting “feels like” standards.

103 posted on 03/10/2015 6:54:06 PM PDT by RetiredTexasVet (When Socialism changes to Communism: When they take your guns and bring out theirs.)

To: FredZarguna

since your material has to be measure in L-squared your answer is incorrect.

104 posted on 03/10/2015 6:54:15 PM PDT by Perdogg (I'm on a no Carb diet- NO Christie Ayotte Romney or Bush - stay outta da Bushesh)

To: Dr. Thorne

Doesn’t say the sides have to be integers, just that the area is 12.

105 posted on 03/10/2015 6:54:42 PM PDT by FredZarguna (O, Reason not the need.)

To: The Truth Will Make You Free
Any answer over two 4 times the square root of 12 could be correct
106 posted on 03/10/2015 6:56:13 PM PDT by FredZarguna (O, Reason not the need.)

To: Intolerant in NJ
How long (or round) do you need for a baby blanket?
107 posted on 03/10/2015 6:56:48 PM PDT by norton

To: eastforker

Even better catch!

108 posted on 03/10/2015 6:57:02 PM PDT by mmichaels1970

To: Perdogg

What in the world is “L-squared?” It says nothing about “L-squared.” It says square units. Square units just means square inches or square centimeters, or square parsecs. Nothing more.

109 posted on 03/10/2015 6:57:54 PM PDT by FredZarguna (O, Reason not the need.)

To: FredZarguna

Right. Thanks.

110 posted on 03/10/2015 6:58:35 PM PDT by The Truth Will Make You Free

To: RetiredTexasVet

sq. units doesn’t rule out non-integer lengths. Not in the least.

111 posted on 03/10/2015 6:59:20 PM PDT by FredZarguna (O, Reason not the need.)

To: TaMoDee

Doesn’t say it’s a square quilt.

112 posted on 03/10/2015 7:03:29 PM PDT by FredZarguna (O, Reason not the need.)

To: FredZarguna

Ok. I can buy that, but I can’t seem to find two non-integers where L*W equals 12 and 2L + 2W equals any of the other choices

113 posted on 03/10/2015 7:04:23 PM PDT by mmichaels1970

To: MNDude

The area of the boarder is the boarder width times the perimeter plus four times the width of the boarder squared.

A=pb+4b^2

the problem only gives the area of the object to which the boarder is attached. The perimeter can be any value from four times the square root of three times pi up to infinity. Therefore A can be your favorite number. Mine happens to be e=2.718281828459045.

114 posted on 03/10/2015 7:06:00 PM PDT by ALPAPilot

To: ALPAPilot; All
Show Dick some respect!

115 posted on 03/10/2015 7:09:09 PM PDT by mmichaels1970

To: MNDude

This is for second grade

Then quit listening to people trying to make it complex.

116 posted on 03/10/2015 7:10:19 PM PDT by thackney (life is fragile, handle with prayer)

To: FredZarguna

“sq. units doesn’t (sic) rule out non-integer lengths. Not in the least.”

They don’t in all cases, but they do in this problem because it specifically states 12 sq. units.

117 posted on 03/10/2015 7:10:44 PM PDT by RetiredTexasVet (When Socialism changes to Communism: When they take your guns and bring out theirs.)

To: MNDude

Dude, admit it. You KNEW this was going to happen!

118 posted on 03/10/2015 7:10:58 PM PDT by mmichaels1970

To: norton

I don’t know - depends on the size of the units I guess - and actually fourteen wouldn’t be the right answer, since you’d have to add an addition four units to cover the corners - you’d have to have non-integer units to have any of the answers given be correct.....

119 posted on 03/10/2015 7:18:26 PM PDT by Intolerant in NJ

To: MNDude

E. Portugal

120 posted on 03/10/2015 7:18:42 PM PDT by blueunicorn6 ("A crack shot and a good dancer")