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Topic review (newest first)
- bobbym
- 2012-10-04 06:43:47
Kaboobly doo! Oh wait, I liked A too. Brilliant answer then.
- zee-f
- 2012-10-04 06:41:36
It turned out to be .217 as a correct answer 
- bob bundy
- 2012-10-02 16:45:37
hi zee-f
Answer A is the correct answer.
If your teacher has a different answer on the markers sheet ask that it be corrected.
You may use the evidence below.
Bob
ps.
41.4 divided by 9 gives be 4.6 and when I check it it is correct why do they give us such weird decimal confusing numbers it confuses me and it gets annoying
Yes, you are right. If shape A is transformed into B using a scale factor the correct way to compute the sf is to calculate B/A.
I don't know why they have this back to front, but you can get their answers by doing A/B so it looks like you'll have to live with this. Just be prepared to do it properly when you meet scale factors elsewhere!
- bobbym
- 2012-10-02 07:33:59
What did they say the answer was? It really should be A.
- zee-f
- 2012-10-02 07:31:33
me 2 but I got D as incorrect
- bobbym
- 2012-10-02 07:20:29
I like D.
- zee-f
- 2012-10-02 07:20:04
41.4 divided by 9 gives be 4.6 and when I check it it is correct why do they give us such weird decimal confusing numbers it confuses me and it gets annoying
- zee-f
- 2012-10-02 07:14:36
I answered 5-D 8-D 9-E 10-B and they were all incorrect So I revised it and here is what I got wondering if it is correct
5. A because 9/41.4 gives me 0.2173913
but when I check it its wrong 
5. A = 9, 10, 16, 19 B = 41.4, 46, 73.6, 87.4
A Prop, s.f. = 0.217
B Prop, s.f. = 0.318
C Prop, s.f. = 0.421
D Not prop
E Prop, s.f. = 0.294
F Prop, s.f. = 0.721
- bobbym
- 2012-10-02 07:07:34
Hi;
Not necessary.
.2439 can be rounded to .244. That is why I like A.
- zee-f
- 2012-10-02 07:03:34
28.7 x 0.244= 7.0028 so I ignore the 0028? right
- bobbym
- 2012-10-02 06:56:45
Hi;
That is what I got too. Did you check it?
- zee-f
- 2012-10-02 06:51:40
A = 7, 7, 21, 23 B = 28.7, 28.7, 86.1, 94.3
I got A as correct but like I rounded 0.2439 to 2440 is that a correct option? or is there another way to get the answer.
A Prop, s.f. = 0.244
B Prop, s.f. = 0.215
C Prop, s.f. = 0.284
D Prop, s.f. = 0.297
E Prop, s.f. = 0.236
F Prop, s.f. = 0.212
- bob bundy
- 2012-10-02 06:27:22
It just depends on whether you do (A divided by B) or (B divided by A).
If the second shape has got smaller you want a fraction for the scale factor and if it has got bigger you want a number over 1.
Yet it seems your course teachers have this back to front ???
No problem as long as the questions are consistent about this.
Bob
- bobbym
- 2012-10-02 06:22:58
Hi;
I divided 7/28.7 and got 0.2439024 in the calculator but when I did it I got 4.1
You went backwards on that calculation with the calculator?
- zee-f
- 2012-10-02 06:20:22
Find the scale factor of each if the polygons are proportional
A = 7, 7, 21, 23 B = 28.7, 28.7, 86.1, 94.3
I choose A and I am still kind of confused because I divided 7/28.7 and got 0.2439024 in the calculator but when I did it I got 4.1
A Prop, s.f. = 0.244
B Prop, s.f. = 0.215
C Prop, s.f. = 0.284
D Prop, s.f. = 0.297
E Prop, s.f. = 0.236
F Prop, s.f. = 0.212