4A Ratio

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4A Ratio
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Ratios represent how one number is related to
another number. A ratio may be written as AB
or A/B or by the phrase "A to B". A ratio of
15 says that the second number is five times as
large as the first.
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5/? 25/40
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A grocery store sells three different-sized cans
of orange juice.  A 6-oz can costs 55 cents. 
A 16-oz can costs 1.15.  A 32-oz can costs
2.79.  Which is the best buy? 
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100,000 cm 1 km
50000cm .5 km
Map scale 150000
4 cm ? km
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Example 5-5a
y3 y3 y3 y3 y3 y3 y3 y3 y3 y3 y3 y3
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Example 5-5b
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Example 5-5c
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Example 5-6a
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Example 5-6c
Answer 5x
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Simplify 3(2-4P) 2(P8)
2-4P 2-4P 2-4P
P8 P8
-10P22
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Simplify 3(2-4P) - 2(P8)
2-4P 2-4P 2-4P
-P-8 -P-8
-14P-10
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All About Ratios 
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Elab Proportions
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The golden ratio is a special number
approximately equal to 1.6180339887498948482.
We use the Greek letter Phi to refer to this
ratio.
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A GOLDEN GREEK FACE
a Top-of-head to chin ___.__ cmb
Top-of-head to pupil ___.__ cmc Pupil to
nosetip         ___.__ cmd Pupil to lip
               ___.__ cme Width of nose
          ___.__ cmf Outside distance between
eyes ___.__ cmg Width of head    ___.__
cmh Hairline to pupil ___.__ cmi Nosetip
to chin ___.__ cmj Lips to chin ___.__
cmk Length of lips ___.__ cmI Nosetip to
lips ___.__ cm
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Cricket experiment 
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Ratio Match