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find ratio: 36 miles to 45 miles
-----------------------------------------------
lowest common denomator: 7, 14, 21, 36
-----------------------------------------------------------
find area: 7/9 28/11

2007-12-17 05:33:43 · 4 answers · asked by supergirl07 1 in Science & Mathematics Mathematics

4 answers

PROBLEM 1:

Ratio:
36/45

Now reduce by dividing top and bottom by 9:
4/5

PROBLEM 2:

Do the prime factorization first:
7 = 7
14 = 2 x 7
21 = 3 x 7
36 = 2 x 2 x 3 x 3

To cover all of this you need:
2 x 2 x 3 x 3 x 7
= 252

PROBLEM 3:

Area = length x width.

7/9 x 28/11

Just multiply across:
7 x 28
---------
9 x 11

= 196/99

2007-12-17 05:42:34 · answer #1 · answered by Puzzling 7 · 0 0

1) ratio can be .8 to 1 or 4 to 5

2) there is no lowest common denominator because all numbers are divisible by 7 except 36.

3) the area is about 1.9798 if you are doing (7/9) by (28/11)

2007-12-17 13:41:44 · answer #2 · answered by Jake T 1 · 0 0

OK

36 is to 45 as ?

36/45 = 4/5

36 is to 45 as 4 is to 5
==================

7, 14, 21,36

7 is prime
14 is 7x2
21 is 7x3
36 is 3x3x2x2

LCD = 7x2x3x2x3 = 252

Check
252 /7 = 36
252/14 = 18
252/21 = 12
252/36 = 7
-------------------------
Find area

7/9 x 28/11 (I think this is what you are asking)

196/99 = 1 97/99 = 1.9797979797

Hope that helps.

2007-12-17 13:41:24 · answer #3 · answered by pyz01 7 · 0 0

divide by 9 .........36:45 = 4:5
------------------------------------------------
factors of the numbers are [7] , [ 2, 7] , [3, 7], [ 2,2,3,3 ]
LCD = 2 . 2 . 3 . 3 .7 =252
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2007-12-17 13:47:09 · answer #4 · answered by pioneers 5 · 0 0

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